Summary
Semantic MediaWiki contains a cross-site request forgery vulnerability in Special:SMWAdmin that can cause privileged administrative actions to execute without the user's intentional approval. If an authenticated user with the smw-admin permission visits a malicious page, an attacker may trigger schema setup, entity disposal, or job operations.
Semantic MediaWiki contains a cross-site request forgery vulnerability in Special:SMWAdmin that can cause privileged administrative actions to execute without the user's intentional approval. If an authenticated user with the smw-admin permission visits a malicious page, an attacker may trigger schema setup, entity disposal, or job operations.
Affected context
The issue affects Semantic MediaWiki deployments using the Special:SMWAdmin interface when an authenticated user with the smw-admin capability can be induced to load attacker-controlled content. The risk arises when the interface overwrites its edit token with a newly generated valid token rather than maintaining a token bound to the intended request and user action.
The issue affects Semantic MediaWiki deployments using the Special:SMWAdmin interface when an authenticated user with the smw-admin capability can be induced to load attacker-controlled content. The risk arises when the interface overwrites its edit token with a newly generated valid token rather than maintaining a token bound to the intended request and user action.
Exploit preconditions
- Attack surface: The Special:SMWAdmin administrative web interface
- Required access: An authenticated victim with the
smw-adminpermission - Trigger point: The victim must visit or load attacker-controlled content that submits requests to administrative actions
- Why exploitation is possible: The interface replaces the expected request token with a freshly generated valid token, weakening the intended CSRF protection and allowing cross-site requests to be accepted
- Attack surface: The Special:SMWAdmin administrative web interface
- Required access: An authenticated victim with the
smw-adminpermission - Trigger point: The victim must visit or load attacker-controlled content that submits requests to administrative actions
- Why exploitation is possible: The interface replaces the expected request token with a freshly generated valid token, weakening the intended CSRF protection and allowing cross-site requests to be accepted
Why this happens
The vulnerability results from incorrect CSRF token handling in the administrative interface. By overwriting the expected wpEditToken with a newly generated valid token, the application fails to reliably bind sensitive state-changing requests to an intentional action from the authenticated user. This behavior maps to CWE-352, Cross-Site Request Forgery, because a trusted browser session may be used to perform administrative operations initiated by an untrusted site.
The vulnerability results from incorrect CSRF token handling in the administrative interface. By overwriting the expected wpEditToken with a newly generated valid token, the application fails to reliably bind sensitive state-changing requests to an intentional action from the authenticated user. This behavior maps to CWE-352, Cross-Site Request Forgery, because a trusted browser session may be used to perform administrative operations initiated by an untrusted site.
Potential impact
- An attacker may trigger schema setup actions without the administrator's intent.
- Semantic entities or related data could be disposed of, causing data loss.
- Repeated or expensive job actions could consume application resources.
- Administrative workflows may be disrupted.
- Semantic data integrity could be affected.
- An attacker may trigger schema setup actions without the administrator's intent.
- Semantic entities or related data could be disposed of, causing data loss.
- Repeated or expensive job actions could consume application resources.
- Administrative workflows may be disrupted.
- Semantic data integrity could be affected.
General mitigation guidance
Mitigation generally focuses on preserving strong request-origin validation for
every state-changing administrative operation.
Common defensive patterns include:
- Use framework-provided CSRF protections without replacing or regenerating tokens in ways that weaken request binding.
- Require unpredictable, session-bound tokens for all state-changing requests.
- Validate request origin and, where appropriate, enforce suitable SameSite cookie behavior.
- Require explicit confirmation for destructive or resource-intensive administrative actions.
- Apply least privilege so only necessary users receive the
smw-admincapability. - Add server-side authorization and CSRF checks independently of client-side controls.
Mitigation generally focuses on preserving strong request-origin validation for
every state-changing administrative operation.
Common defensive patterns include:
- Use framework-provided CSRF protections without replacing or regenerating tokens in ways that weaken request binding.
- Require unpredictable, session-bound tokens for all state-changing requests.
- Validate request origin and, where appropriate, enforce suitable SameSite cookie behavior.
- Require explicit confirmation for destructive or resource-intensive administrative actions.
- Apply least privilege so only necessary users receive the
smw-admincapability. - Add server-side authorization and CSRF checks independently of client-side controls.
How teams detect issues like this
Organizations can identify similar issues through:
- Static analysis and code review for token overwrites, token regeneration, or missing CSRF checks around state-changing handlers.
- Review of administrative endpoints that accept cross-site form submissions or browser-initiated requests.
- Tests that submit sensitive actions without valid session-bound tokens and verify rejection.
- Web application policy checks for unsafe cross-origin requests and cookie settings.
- Monitoring for unexpected schema, entity-disposal, or job actions associated with valid administrator sessions.
Automated security review tools may help flag missing or inconsistently applied CSRF protections.
Organizations can identify similar issues through:
- Static analysis and code review for token overwrites, token regeneration, or missing CSRF checks around state-changing handlers.
- Review of administrative endpoints that accept cross-site form submissions or browser-initiated requests.
- Tests that submit sensitive actions without valid session-bound tokens and verify rejection.
- Web application policy checks for unsafe cross-origin requests and cookie settings.
- Monitoring for unexpected schema, entity-disposal, or job actions associated with valid administrator sessions.
Automated security review tools may help flag missing or inconsistently applied CSRF protections.
