PatchSiren cyber security CVE debrief

CVE-2026-56396 phpMyFAQ CVE debrief

CVE-2026-56396 is a high-severity vulnerability in phpMyFAQ, a popular open-source FAQ management system. The vulnerability has a CVSS score of 8.7 and allows authenticated administrators to escalate privileges due to missing authorization in the editUser() and updateUserRights() endpoints. Non-SuperAdmin users with edit_user permission can set the is_superadmin flag or grant arbitrary rights to escalate to SuperAdmin access. This vulnerability affects phpMyFAQ versions before 4.1.4. Defenders should prioritize patching or mitigating this vulnerability to prevent potential privilege escalation attacks.

Vendor: phpMyFAQ
Product: Unknown
CVSS: HIGH 8.7
CISA KEV: Not listed in stored evidence
Original CVE published: 2026-06-21
Original CVE updated: 2026-06-23
Advisory published: 2026-06-21
Advisory updated: 2026-06-23

Who should care

System administrators and security teams responsible for managing and securing phpMyFAQ installations should be aware of this vulnerability. Additionally, developers and DevOps teams involved in the maintenance and updates of phpMyFAQ should prioritize patching or mitigating this vulnerability to prevent potential privilege escalation attacks.

Technical summary

The CVE-2026-56396 vulnerability is caused by missing authorization in the editUser() and updateUserRights() endpoints of phpMyFAQ. This allows authenticated administrators to escalate privileges, potentially leading to unauthorized access and control of the FAQ management system. The vulnerability has been assigned a CVSS score of 8.7, indicating a high severity level. The CVSS vector is CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X.

Defensive priority

High priority due to potential for privilege escalation and high CVSS score.

Recommended defensive actions

Apply the official patch or update to phpMyFAQ version 4.1.4 or later.
Review and restrict edit_user permissions for non-SuperAdmin users.
Monitor and audit user activity and privilege changes.
Implement compensating controls, such as role-based access control and segregation of duties.
Verify the integrity of user accounts and permissions.

Evidence notes

The primary evidence for this vulnerability comes from the NVD and CVE.org records. The vulnerability affects phpMyFAQ versions before 4.1.4. Defenders should verify the version of phpMyFAQ installed and review user accounts and permissions to ensure that only authorized users have elevated privileges.

Sources and references

Verified primary and authoritative sources

CVE-2026-56396 CVE Program record
Publisher, destination, and source semantics verified

URL: https://www.cve.org/CVERecord?id=CVE-2026-56396

CVE Program - Official CVE Program record with source-provided CVE metadata.
CVE-2026-56396 NVD vulnerability detail
Publisher, destination, and source semantics verified

URL: https://nvd.nist.gov/vuln/detail/CVE-2026-56396

NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Source reference
Unverified legacy reference

URL: https://github.com/thorsten/phpMyFAQ/security/advisories/GHSA-985r-q3qp-299h

[email protected]
Source reference
Unverified legacy reference

URL: https://www.vulncheck.com/advisories/phpmyfaq-privilege-escalation-via-missing-authorization-in-edituser-and-updateuserrights

[email protected]

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.