Piwigo up to 16.3.x Logo Upload themes_standard_pages.php std_pgs_logo unrestricted upload

Summaryinfo

A vulnerability marked as problematic has been reported in Piwigo up to 16.3.x. This issue affects some unknown processing of the file admin/themes_standard_pages.php of the component Logo Upload. Performing a manipulation of the argument std_pgs_logo results in unrestricted upload. This vulnerability is reported as CVE-2026-42322. The attack is possible to be carried out remotely. No exploit exists. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic has been found in Piwigo up to 16.3.x. This affects an unknown code of the file admin/themes_standard_pages.php of the component Logo Upload. The manipulation of the argument std_pgs_logo with an unknown input leads to a unrestricted upload vulnerability. CWE is classifying the issue as CWE-434. The product allows the attacker to upload or transfer files of dangerous types that can be automatically processed within the product's environment. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

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.

The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2026-42322 since 04/26/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. Additional levels of successful authentication are required for exploitation. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1608.002 for this issue.

By approaching the search of inurl:admin/themes_standard_pages.php it is possible to find vulnerable targets with Google Hacking.

Upgrading to version 16.4.0 eliminates this vulnerability.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

• Photo Gallery Software

Name

• Piwigo

Version

• 16.0
• 16.1
• 16.2
• 16.3

License

• open-source

Website

• Product: https://github.com/Piwigo/Piwigo/

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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