CVE-2026-42322
criticalPiwigo is a full featured open source photo gallery application for the web.
Piwigo is a full featured open source photo gallery application for the web. Prior to 16.4.0, admin/themes_standard_pages.php validates uploaded logo content by MIME type but reuses the attacker-controlled extension from std_pgs_logo when constructing the stored filename. An authenticated administrator can upload image content with a server-executable final extension, causing the file to be placed in the web-accessible logo directory and executed when requested if the web server handles that extension. This can permit arbitrary command execution, data disclosure, modification, persistence, and service disruption. This vulnerability is fixed in 16.4.0.
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H Affected products
Not reported by the source (unknown — not "none").
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://github.com/Piwigo/Piwigo/commit/1e7f7262cb30e6916779f93e66d5d6579ec75a11 security-advisories@github.com
- https://github.com/Piwigo/Piwigo/commit/4a13ec9a8f4881ae1f23bdfd24d7b90cd0802cdc security-advisories@github.com
- https://github.com/Piwigo/Piwigo/releases/tag/16.4.0 security-advisories@github.com
- https://github.com/Piwigo/Piwigo/security/advisories/GHSA-7w97-5g4p-xqvv security-advisories@github.com
- https://github.com/Piwigo/Piwigo/security/advisories/GHSA-7w97-5g4p-xqvv 134c704f-9b21-4f2e-91b3-4a467353bcc0