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CompTIA CySA+ (CS0-003) CS0-003 Practice Test 23

Question 220

An intranet document service lets a logged-in user change a numerical object ID to open another employee's confidential report. What limitation would still matter after the initial action succeeds?

  1. Bulk export endpoints may bypass the same authorization logic unless assessed.
  2. A staff transfer might leave a valid old sharing link requiring governance review.
  3. The new authorization check may omit ownership changes during account transfer.
  4. Support staff may need updated role documentation after the new per-object permissions are deployed.

Explanation

Correct Answer

A:

The response does not eliminate all future or hidden exposures. This particular follow-on issue is connected to the case: Bulk export endpoints may bypass the same authorization logic unless assessed. The initial control is: Enforce per-object authorization on every server-side request, not just navigation-level role checks.

Incorrect Answers

B:

A staff transfer might leave a valid old sharing link requiring governance review. This is a conceivable secondary or conditional concern, but is not the residual exposure most directly tied to the scenario and its chosen response. Bulk export endpoints may bypass the same authorization logic unless assessed.

C:

The new authorization check may omit ownership changes during account transfer. This is a conceivable secondary or conditional concern, but is not the residual exposure most directly tied to the scenario and its chosen response. Bulk export endpoints may bypass the same authorization logic unless assessed.

D:

Support staff may need updated role documentation after the new per-object permissions are deployed. This concerns an adjacent administrative, operational or conditional risk, not the particular continuing weakness supported most directly by An intranet document service lets a logged-in user change a numerical object ID to open another employee's confidential report. The specific case-derived residual is: Bulk export endpoints may bypass the same authorization logic unless assessed.

Question 221

A customer search page writes user-provided text into an HTML template without context-specific encoding. What is the most defensible response to this situation?

  1. Sanitize input only on the client and insert it unsafely into HTML later.
  2. Install a generic firewall signature but retain unsafe template interpolation.
  3. Apply safe output encoding and templating and validate risky content in the actual browser context.
  4. Disable search entirely instead of fixing context-aware output handling.

Explanation

Correct Answer

C:

The selected step uses the available evidence proportionately and directly addresses the specific condition. The governing technical issue is: Unescaped untrusted output can be interpreted as active script in the recipient's browser. The relevant next action is: Apply safe output encoding and templating and validate risky content in the actual browser context.

Incorrect Answers

A:

Sanitize input only on the client and insert it unsafely into HTML later. This option does not establish the stated result with sufficient evidence. Unescaped untrusted output can be interpreted as active script in the recipient's browser. The case therefore requires a different action: Apply safe output encoding and templating and validate risky content in the actual browser context.

B:

Install a generic firewall signature but retain unsafe template interpolation. This option does not establish the stated result with sufficient evidence. Unescaped untrusted output can be interpreted as active script in the recipient's browser. The case therefore requires a different action: Apply safe output encoding and templating and validate risky content in the actual browser context.

D:

Disable search entirely instead of fixing context-aware output handling. This option does not establish the stated result with sufficient evidence. Unescaped untrusted output can be interpreted as active script in the recipient's browser. The case therefore requires a different action: Apply safe output encoding and templating and validate risky content in the actual browser context.

Question 222

A customer search page writes user-provided text into an HTML template without context-specific encoding. What risk mechanism should guide the analyst’s judgment?

  1. A server-side rendered page cannot execute untrusted browser script.
  2. Escaping content in a SQL query also secures arbitrary HTML output contexts.
  3. Unescaped untrusted output can be interpreted as active script in the recipient's browser.
  4. Any visible reflected text proves a script has already run.

Explanation

Correct Answer

C:

This interpretation explains the observation without treating a clue as proof beyond its scope. The central mechanism is: Unescaped untrusted output can be interpreted as active script in the recipient's browser. It directs the analyst toward: Apply safe output encoding and templating and validate risky content in the actual browser context.

Incorrect Answers

A:

A server-side rendered page cannot execute untrusted browser script. This alternative causal claim assumes facts beyond the observation, which is: A customer search page writes user-provided text into an HTML template without context-specific encoding. The directly supported mechanism is: Unescaped untrusted output can be interpreted as active script in the recipient's browser.

B:

Escaping content in a SQL query also secures arbitrary HTML output contexts. This alternative causal claim assumes facts beyond the observation, which is: A customer search page writes user-provided text into an HTML template without context-specific encoding. The directly supported mechanism is: Unescaped untrusted output can be interpreted as active script in the recipient's browser.

D:

Any visible reflected text proves a script has already run. This alternative causal claim assumes facts beyond the observation, which is: A customer search page writes user-provided text into an HTML template without context-specific encoding. The directly supported mechanism is: Unescaped untrusted output can be interpreted as active script in the recipient's browser.

Question 223

A customer search page writes user-provided text into an HTML template without context-specific encoding. Which result would most directly verify that the investigation or mitigation addressed this case?

  1. The page passes a server-side search test but injected text runs in a browser.
  2. A WAF rule blocks one payload but template output remains unescaped.
  3. One sanitized input field passes while another DOM insertion renders executable script.
  4. Authorized test strings render as inert text across the affected display contexts.

Explanation

Correct Answer

D:

This check measures the particular condition that the response was intended to change, rather than unrelated activity or a generic dashboard count. Specifically: Authorized test strings render as inert text across the affected display contexts. It tests whether: Apply safe output encoding and templating and validate risky content in the actual browser context.

Incorrect Answers

A:

The page passes a server-side search test but injected text runs in a browser. This test or metric does not demonstrate the complete target effect of Apply safe output encoding and templating and validate risky content in the actual browser context. The decisive observable confirmation is: Authorized test strings render as inert text across the affected display contexts.

B:

A WAF rule blocks one payload but template output remains unescaped. This test or metric does not demonstrate the complete target effect of Apply safe output encoding and templating and validate risky content in the actual browser context. The decisive observable confirmation is: Authorized test strings render as inert text across the affected display contexts.

C:

One sanitized input field passes while another DOM insertion renders executable script. This test or metric does not demonstrate the complete target effect of Apply safe output encoding and templating and validate risky content in the actual browser context. The decisive observable confirmation is: Authorized test strings render as inert text across the affected display contexts.

Question 224

A customer search page writes user-provided text into an HTML template without context-specific encoding. What limitation would still matter after the initial action succeeds?

  1. A different DOM insertion path may still introduce client-side script injection.
  2. A legacy browser might display escaped characters differently without actually executing script code.
  3. A trusted third-party widget could weaken the site's content-security-policy defenses.
  4. A trusted third-party script could change the display context after rendering.

Explanation

Correct Answer

A:

The response does not eliminate all future or hidden exposures. This particular follow-on issue is connected to the case: A different DOM insertion path may still introduce client-side script injection. The initial control is: Apply safe output encoding and templating and validate risky content in the actual browser context.

Incorrect Answers

B:

A legacy browser might display escaped characters differently without actually executing script code. This concerns an adjacent administrative, operational or conditional risk, not the particular continuing weakness supported most directly by A customer search page writes user-provided text into an HTML template without context-specific encoding. The specific case-derived residual is: A different DOM insertion path may still introduce client-side script injection.

C:

A trusted third-party widget could weaken the site's content-security-policy defenses. This is a conceivable secondary or conditional concern, but is not the residual exposure most directly tied to the scenario and its chosen response. A different DOM insertion path may still introduce client-side script injection.

D:

A trusted third-party script could change the display context after rendering. This is a conceivable secondary or conditional concern, but is not the residual exposure most directly tied to the scenario and its chosen response. A different DOM insertion path may still introduce client-side script injection.

Question 225

A password-reset endpoint accepts a forged request from an unrelated website when the victim is still authenticated. What is the most defensible response to this situation?

  1. Require user login and assume authenticated requests cannot be forged.
  2. Use only a rate limit without CSRF tokens or origin validation.
  3. Use anti-CSRF tokens or equivalent request-origin controls and appropriate SameSite cookie policy.
  4. Hide the reset button in the interface while leaving forged state-changing requests accepted.

Explanation

Correct Answer

C:

The selected step uses the available evidence proportionately and directly addresses the specific condition. The governing technical issue is: A browser can attach valid session cookies to a cross-site request, so authentication alone does not prove user intent. The relevant next action is: Use anti-CSRF tokens or equivalent request-origin controls and appropriate SameSite cookie policy.

Incorrect Answers

A:

Require user login and assume authenticated requests cannot be forged. This option does not establish the stated result with sufficient evidence. A browser can attach valid session cookies to a cross-site request, so authentication alone does not prove user intent. The case therefore requires a different action: Use anti-CSRF tokens or equivalent request-origin controls and appropriate SameSite cookie policy.

B:

Use only a rate limit without CSRF tokens or origin validation. This option does not establish the stated result with sufficient evidence. A browser can attach valid session cookies to a cross-site request, so authentication alone does not prove user intent. The case therefore requires a different action: Use anti-CSRF tokens or equivalent request-origin controls and appropriate SameSite cookie policy.

D:

Hide the reset button in the interface while leaving forged state-changing requests accepted. This option does not establish the stated result with sufficient evidence. A browser can attach valid session cookies to a cross-site request, so authentication alone does not prove user intent. The case therefore requires a different action: Use anti-CSRF tokens or equivalent request-origin controls and appropriate SameSite cookie policy.

Question 226

A password-reset endpoint accepts a forged request from an unrelated website when the victim is still authenticated. What risk mechanism should guide the analyst’s judgment?

  1. A browser-attached valid session cookie always proves user consent to each request.
  2. Cross-site request forgery requires the attacker to know the user's password.
  3. Using HTTPS alone prevents a hostile website from causing state changes.
  4. A browser can attach valid session cookies to a cross-site request, so authentication alone does not prove user intent.

Explanation

Correct Answer

D:

This interpretation explains the observation without treating a clue as proof beyond its scope. The central mechanism is: A browser can attach valid session cookies to a cross-site request, so authentication alone does not prove user intent. It directs the analyst toward: Use anti-CSRF tokens or equivalent request-origin controls and appropriate SameSite cookie policy.

Incorrect Answers

A:

A browser-attached valid session cookie always proves user consent to each request. This alternative causal claim assumes facts beyond the observation, which is: A password-reset endpoint accepts a forged request from an unrelated website when the victim is still authenticated. The directly supported mechanism is: A browser can attach valid session cookies to a cross-site request, so authentication alone does not prove user intent.

B:

Cross-site request forgery requires the attacker to know the user's password. This alternative causal claim assumes facts beyond the observation, which is: A password-reset endpoint accepts a forged request from an unrelated website when the victim is still authenticated. The directly supported mechanism is: A browser can attach valid session cookies to a cross-site request, so authentication alone does not prove user intent.

C:

Using HTTPS alone prevents a hostile website from causing state changes. This alternative causal claim assumes facts beyond the observation, which is: A password-reset endpoint accepts a forged request from an unrelated website when the victim is still authenticated. The directly supported mechanism is: A browser can attach valid session cookies to a cross-site request, so authentication alone does not prove user intent.

Question 227

A password-reset endpoint accepts a forged request from an unrelated website when the victim is still authenticated. Which result would most directly verify that the investigation or mitigation addressed this case?

  1. A simulated cross-origin request is rejected without breaking an authorized password-reset workflow.
  2. The application requires login but a cross-origin password-reset request still succeeds.
  3. A rate limit reduces request volume without rejecting a single forged state change.
  4. The reset button disappears but a crafted request still changes an account.

Explanation

Correct Answer

A:

This check measures the particular condition that the response was intended to change, rather than unrelated activity or a generic dashboard count. Specifically: A simulated cross-origin request is rejected without breaking an authorized password-reset workflow. It tests whether: Use anti-CSRF tokens or equivalent request-origin controls and appropriate SameSite cookie policy.

Incorrect Answers

B:

The application requires login but a cross-origin password-reset request still succeeds. This test or metric does not demonstrate the complete target effect of Use anti-CSRF tokens or equivalent request-origin controls and appropriate SameSite cookie policy. The decisive observable confirmation is: A simulated cross-origin request is rejected without breaking an authorized password-reset workflow.

C:

A rate limit reduces request volume without rejecting a single forged state change. This test or metric does not demonstrate the complete target effect of Use anti-CSRF tokens or equivalent request-origin controls and appropriate SameSite cookie policy. The decisive observable confirmation is: A simulated cross-origin request is rejected without breaking an authorized password-reset workflow.

D:

The reset button disappears but a crafted request still changes an account. This test or metric does not demonstrate the complete target effect of Use anti-CSRF tokens or equivalent request-origin controls and appropriate SameSite cookie policy. The decisive observable confirmation is: A simulated cross-origin request is rejected without breaking an authorized password-reset workflow.

Question 228

A password-reset endpoint accepts a forged request from an unrelated website when the victim is still authenticated. What limitation would still matter after the initial action succeeds?

  1. Other state-changing routes may require the same anti-CSRF enforcement.
  2. Session cookies might remain valid longer than the organization's stated security policy.
  3. Older browsers may enforce a different SameSite behavior than current tests assume.
  4. A trusted subdomain could introduce a separate origin-validation edge case.

Explanation

Correct Answer

A:

The response does not eliminate all future or hidden exposures. This particular follow-on issue is connected to the case: Other state-changing routes may require the same anti-CSRF enforcement. The initial control is: Use anti-CSRF tokens or equivalent request-origin controls and appropriate SameSite cookie policy.

Incorrect Answers

B:

Session cookies might remain valid longer than the organization's stated security policy. This is a conceivable secondary or conditional concern, but is not the residual exposure most directly tied to the scenario and its chosen response. Other state-changing routes may require the same anti-CSRF enforcement.

C:

Older browsers may enforce a different SameSite behavior than current tests assume. This is a conceivable secondary or conditional concern, but is not the residual exposure most directly tied to the scenario and its chosen response. Other state-changing routes may require the same anti-CSRF enforcement.

D:

A trusted subdomain could introduce a separate origin-validation edge case. This is a conceivable secondary or conditional concern, but is not the residual exposure most directly tied to the scenario and its chosen response. Other state-changing routes may require the same anti-CSRF enforcement.

Question 229

A service reads arbitrary URLs supplied by clients and can fetch private cloud metadata endpoints inaccessible to ordinary users. What is the most defensible response to this situation?

  1. Block the current metadata IP but allow arbitrary redirects to other private destinations.
  2. Validate only the user-supplied hostname before DNS changes and redirect resolution.
  3. Restrict outbound destinations and metadata access, resolve and validate URLs safely, and enforce least-privilege service identity.
  4. Treat any HTTPS target as safe for server-side fetching regardless of internal reachability.

Explanation

Correct Answer

C:

The selected step uses the available evidence proportionately and directly addresses the specific condition. The governing technical issue is: Server-side request forgery abuses the server's network reachability rather than the attacker's own access. The relevant next action is: Restrict outbound destinations and metadata access, resolve and validate URLs safely, and enforce least-privilege service identity.

Incorrect Answers

A:

Block the current metadata IP but allow arbitrary redirects to other private destinations. This option does not establish the stated result with sufficient evidence. Server-side request forgery abuses the server's network reachability rather than the attacker's own access. The case therefore requires a different action: Restrict outbound destinations and metadata access, resolve and validate URLs safely, and enforce least-privilege service identity.

B:

Validate only the user-supplied hostname before DNS changes and redirect resolution. This option does not establish the stated result with sufficient evidence. Server-side request forgery abuses the server's network reachability rather than the attacker's own access. The case therefore requires a different action: Restrict outbound destinations and metadata access, resolve and validate URLs safely, and enforce least-privilege service identity.

D:

Treat any HTTPS target as safe for server-side fetching regardless of internal reachability. This option does not establish the stated result with sufficient evidence. Server-side request forgery abuses the server's network reachability rather than the attacker's own access. The case therefore requires a different action: Restrict outbound destinations and metadata access, resolve and validate URLs safely, and enforce least-privilege service identity.

Question 230

A service reads arbitrary URLs supplied by clients and can fetch private cloud metadata endpoints inaccessible to ordinary users. What risk mechanism should guide the analyst’s judgment?

  1. A server can access only the public internet when a client supplies an external URL.
  2. URL encoding and redirects cannot change the effective network destination.
  3. Server-side request forgery abuses the server's network reachability rather than the attacker's own access.
  4. A service's own cloud role is irrelevant when requests reach metadata endpoints.

Explanation

Correct Answer

C:

This interpretation explains the observation without treating a clue as proof beyond its scope. The central mechanism is: Server-side request forgery abuses the server's network reachability rather than the attacker's own access. It directs the analyst toward: Restrict outbound destinations and metadata access, resolve and validate URLs safely, and enforce least-privilege service identity.

Incorrect Answers

A:

A server can access only the public internet when a client supplies an external URL. This alternative causal claim assumes facts beyond the observation, which is: A service reads arbitrary URLs supplied by clients and can fetch private cloud metadata endpoints inaccessible to ordinary users. The directly supported mechanism is: Server-side request forgery abuses the server's network reachability rather than the attacker's own access.

B:

URL encoding and redirects cannot change the effective network destination. This alternative causal claim assumes facts beyond the observation, which is: A service reads arbitrary URLs supplied by clients and can fetch private cloud metadata endpoints inaccessible to ordinary users. The directly supported mechanism is: Server-side request forgery abuses the server's network reachability rather than the attacker's own access.

D:

A service's own cloud role is irrelevant when requests reach metadata endpoints. This alternative causal claim assumes facts beyond the observation, which is: A service reads arbitrary URLs supplied by clients and can fetch private cloud metadata endpoints inaccessible to ordinary users. The directly supported mechanism is: Server-side request forgery abuses the server's network reachability rather than the attacker's own access.

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