CamaleonCMS version 2.9.2 and earlier contains a privilege escalation vulnerability via insecure direct object reference (IDOR) that allows authenticated low-privileged attackers to overwrite any user's credentials by exploiting a parameter confusion flaw between the authorization filter and action body in the UsersController. Attackers can send a PATCH request to the updated_ajax endpoint setting params[:id] to their own user ID to pass the self-authorization check while simultaneously setting params[:user_id] to a victim's ID, causing the controller to load and mutate the victim's account, including overwriting administrator passwords to achieve full site takeover.
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Tue, 11 Aug 2026 16:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | CamaleonCMS version 2.9.2 and earlier contains a privilege escalation vulnerability via insecure direct object reference (IDOR) that allows authenticated low-privileged attackers to overwrite any user's credentials by exploiting a parameter confusion flaw between the authorization filter and action body in the UsersController. Attackers can send a PATCH request to the updated_ajax endpoint setting params[:id] to their own user ID to pass the self-authorization check while simultaneously setting params[:user_id] to a victim's ID, causing the controller to load and mutate the victim's account, including overwriting administrator passwords to achieve full site takeover. | |
| Title | CamaleonCMS 2.9.2 Privilege Escalation via Parameter Confusion in UsersController | |
| Weaknesses | CWE-639 | |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: VulnCheck
Published:
Updated: 2026-08-11T17:49:59.294Z
Reserved: 2026-06-22T18:48:39.687Z
Link: CVE-2026-56721
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Status : Received
Published: 2026-08-11T16:17:33.563
Modified: 2026-08-11T16:17:33.563
Link: CVE-2026-56721
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