CVE-2026-111909: Privilege Escalation (CVSS 8.1)

Description

phpMyFAQ before 4.1.9 contains a missing authorization vulnerability in the deleteUser() API that allows authenticated non-superadmin users with delete_user permission to delete superadmin accounts. Attackers can send a DELETE request to /admin/api/user/delete with a superadmin's userId other than 1, removing administrative access and accountability.

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CVSS v3.1 Score

8.1

HIGH

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H

Weakness Type (CWE)

CWE-269 CWE-269

References

Other References

https://github.com/thorsten/phpMyFAQ/security/advisories/GHSA-7j43-ww55-pm3g https://www.vulncheck.com/advisories/phpmyfaq-before-4.1.9-missing-authorization-allows-superadmin-deletion-via-deleteuser-api

Frequently Asked Questions

What is CVE-2026-111909? +

phpMyFAQ before 4.1.9 contains a missing authorization vulnerability in the deleteUser() API that allows authenticated non-superadmin users with delete_user permission to delete superadmin accounts. Attackers can send a DELETE request to /admin/api/user/delete with a superadmin's userId other than 1, removing administrative access and accountability. It has a CVSS v3.1 base score of 8.1 (HIGH).

How severe is CVE-2026-111909? +

CVE-2026-111909 has a CVSS v3.1 score of 8.1 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

How do I check if I'm vulnerable to CVE-2026-111909? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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