SB2026071453 - Multiple vulnerabilities in phpMyFAQ

Description

This security bulletin contains information about 3 vulnerabilities.

1) Missing Authorization (CVE-ID: CVE-2026-49205)

CWE-ID: CWE-862 - Missing Authorization

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear

The vulnerability allows a remote user to perform unauthorized administrative actions.

The vulnerability exists due to missing authorization in public API write endpoints when handling requests authenticated only with a shared API token. A remote user can send a specially crafted API request to perform unauthorized administrative actions.

The issue affects the category creation, FAQ creation, FAQ update, and question creation API endpoints, where per-user permission checks are not enforced.

2) Missing Authorization (CVE-ID: CVE-2026-56396)

CWE-ID: CWE-862 - Missing Authorization

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Green

The vulnerability allows a remote user to escalate privileges.

The vulnerability exists due to improper access control in editUser() and updateUserRights() in the UserController when handling user-supplied userId values for administrative user-management requests. A remote user can send a specially crafted request to escalate privileges.

Exploitation requires an authenticated administrative session with the delegable edit_user permission, and the affected endpoints accept CSRF-protected requests that the user is authorized to make.

3) Reversible One-Way Hash (CVE-ID: CVE-2026-48488)

CWE-ID: CWE-328 - Use of Weak Hash

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green

The vulnerability allows a remote attacker to bypass attachment protection.

The vulnerability exists due to use of a weak hash in phpMyFAQ Attachment password hashing in AbstractAttachment.php when verifying attachment passwords. A remote attacker can generate a SHA-1 collision to bypass attachment protection.

If the password hash database is compromised, the weak hashing algorithm also increases the risk of password cracking.

Remediation

Install update from vendor's website.

References

• https://github.com/thorsten/phpMyFAQ/security/advisories/GHSA-8c6h-7g6x-m5x4
• https://github.com/thorsten/phpMyFAQ/security/advisories/GHSA-985r-q3qp-299h
• https://github.com/thorsten/phpMyFAQ/security/advisories/GHSA-58fg-62fg-3fcj