Piwigo: Authenticated RCE via File Upload in Logo Upload Feature

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-42322
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-25 16:17:25 UTC
Updated2026-09-28 15:17:17 UTC
DescriptionPiwigo 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.

Risk And Classification

Primary CVSS: v3.1 9.1 CRITICAL from [email protected]

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

EPSS: 0.005280000 probability, percentile 0.424340000 (date 2026-09-29)

Problem Types: CWE-434 | CWE-434 CWE-434: Unrestricted Upload of File with Dangerous Type

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary9.1CRITICALCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
3.1CNADECLARED9.1CRITICALCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Piwigo Piwigo affected < 16.4.0 Not specified

References

ReferenceSourceLinkTags
github.com/Piwigo/Piwigo/releases/tag/16.4.0 [email protected] github.com
github.com/Piwigo/Piwigo/commit/1e7f7262cb30e6916779f93e66d5d6579ec75a11 [email protected] github.com
github.com/Piwigo/Piwigo/security/advisories/GHSA-7w97-5g4p-xqvv 134c704f-9b21-4f2e-91b3-4a467353bcc0 github.com
github.com/Piwigo/Piwigo/commit/4a13ec9a8f4881ae1f23bdfd24d7b90cd0802cdc [email protected] github.com
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