What is CVE-2026-24420?

CVE-2026-24420 is a medium-severity vulnerability in Phpmyfaq, classified under Improper Access Control. CVSS score: 6.5/10. Published 2026-01-24.

How severe is CVE-2026-24420?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in Phpmyfaq

CVE-2026-24420

phpMyFAQ is an open source FAQ web application. Versions 4.0.16 and below allow an authenticated user without the dlattachment permission to download FAQ attachments due to a incomprehensive permissions check. The presence of a right key is improperly validated as proof of authorization in attachment.php. Additionally, the group and user permission logic contains a flawed conditional expression that may allow unauthorized access. This issue has been fixed in version

Published 2026-01-24 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.005 (37.7th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 38th percentile — 37.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.005 · change: +0.000

Affected products

Phpmyfaq
Thorsten Phpmyfaq — versions < 4.0.17

Weakness classification (CWE)

CWE-284 — Improper Access Control

References

github.com/thorsten/phpMyFAQ/security/advisories/GHSA-7p9h-m7m8-vhhv (Exploit, Vendor Advisory)

Frequently asked questions

What is CVE-2026-24420?: CVE-2026-24420 is a medium-severity vulnerability in Phpmyfaq, classified under Improper Access Control. CVSS score: 6.5/10. Published 2026-01-24.
How severe is CVE-2026-24420?: Medium severity. CVSS v3 base score is 6.5 out of 10.