CVE-2026-27833 PUBLISHED

Piwigo: Unauthenticated Information Disclosure via pwg.history.search API

Assigner: GitHub_M
Reserved: 24.02.2026 Published: 03.04.2026 Updated: 03.04.2026

Piwigo is an open source photo gallery application for the web. Prior to version 16.3.0, the pwg.history.search API method in Piwigo is registered without the admin_only option, allowing unauthenticated users to access the full browsing history of all gallery visitors. This issue has been patched in version 16.3.0.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CVSS Score: 7.5

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

CVSS 3.1

Product Status

Vendor	Piwigo
Product	Piwigo
Versions	Version < 16.3.0 is affected

References

https://github.com/Piwigo/Piwigo/security/advisories/GHSA-397m-gfhm-pmg2
https://github.com/Piwigo/Piwigo/commit/d05c16561ce3692ca922199f8c8d7b1a45893f1c
https://piwigo.org/release-16.3.0

Problem Types

CWE-862: Missing Authorization CWE