Cotonti 1.0.0 /admin/admin cot_check_xg cross-site request forgery

Summaryinfo

A vulnerability, which was classified as problematic, was found in Cotonti 1.0.0. This issue affects the function cot_check_xg of the file /admin/admin. Executing a manipulation can lead to cross-site request forgery. This vulnerability appears as CVE-2026-55742. The attack may be performed from remote. There is no available exploit. A patch should be applied to remediate this issue.

Detailsinfo

A vulnerability classified as problematic was found in Cotonti 1.0.0. This vulnerability affects the function cot_check_xg of the file /admin/admin. The manipulation with an unknown input leads to a cross-site request forgery vulnerability. The CWE definition for the vulnerability is CWE-352. The web application does not, or can not, sufficiently verify whether a well-formed, valid, consistent request was intentionally provided by the user who submitted the request. As an impact it is known to affect integrity. CVE summarizes:

Cotonti 1.0.0 (master branch, commit f43f1fc3) is vulnerable to Cross-Site Request Forgery in the administration rights handler. In system/admin/admin.rights.php, the rights update action ('a=update') modifies group access rights (including via cot_auth_add_group) without calling cot_check_xg() to validate the anti-CSRF token. A remote attacker who lures an authenticated administrator into visiting a malicious page can force the browser to submit a forged request that grants elevated permissions to an attacker-controlled group, escalating privileges to administrator. Because Cotonti administrators can modify templates and configuration, this can be further leveraged toward remote code execution.

The weakness was presented by Saidakbarxon Maxsudxonov. The advisory is available at github.com. This vulnerability was named CVE-2026-55742 since 06/17/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Successful exploitation requires user interaction by the victim. Technical details are known, but there is no available exploit.

Applying a patch is able to eliminate this problem.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-37854). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Name

• Cotonti

Version

• 1.0.0

Website

• Product: https://github.com/Cotonti/Cotonti/

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If you want to get best quality of vulnerability data, you may have to visit VulDB.

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