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Fencer Intel
medium 6.5

CVE-2026-24421 json

phpMyFAQ missing authorization exposes /api/setup/backup to any authenticated user

published 9mo ago modified 4mo ago also EUVD-2026-4258 , GHSA-wm8h-26fv-mg7g

cvss
6.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.7%
EPSS 1.7% chance of exploitation in 30 days, percentile 77%
public exploits
1
Exploit-DB

Summary

phpMyFAQ is an open source FAQ web application. Versions 4.0.16 and below have flawed authorization logic which exposes the /api/setup/backup endpoint to any authenticated user despite their permissions. SetupController.php uses userIsAuthenticated() but does not verify that the requester has configuration/admin permissions. Non-admin users can trigger a configuration backup and retrieve its path. The endpoint only checks authentication, not authorization, and returns a link to the generated ZIP. This issue is fixed in version 4.0.17.

Patch / fix

  • packagist phpmyfaq/phpmyfaq 4.0.17
  • packagist thorsten/phpmyfaq 4.0.17
  • phpmyfaq phpmyfaq 4.0.17

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Timeline

  1. Published
  2. First public exploit (EDB-52523)

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
9mo ago

Exploit prediction

1.74% chance of exploitation in the next 30 days, higher than 77% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • EDB-52523 phpMyFAQ 4.0.16 - Improper Authorization webapps, 2026-04-29
  • github.com https://github.com/thorsten/phpMyFAQ/security/advisories/GHSA-wm8h-26fv-mg7g referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
GitHub 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Affected packages

ecosystem package affected fixed in
packagist phpmyfaq/phpmyfaq
<4.0.17
4.0.17
packagist thorsten/phpmyfaq
<4.0.17
4.0.17

Affected products

  • thorsten phpMyFAQ

Classification

Weakness

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.