VulnerabilityAnalyzed

CVE-2026-27833

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.

HIGH 7.5EPSS 1.64%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (1.64%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

Description

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.

CVSS 3.1: 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
EPSS: 1.64% probability · 75th percentile
CISA KEV: Not listed
Weakness: CWE-862
Affected: piwigo/piwigo
Source: security-advisories@github.com

References

https://github.com/Piwigo/Piwigo/commit/d05c16561ce3692ca922199f8c8d7b1a45893f1cPatch
https://github.com/Piwigo/Piwigo/security/advisories/GHSA-397m-gfhm-pmg2Exploit, Vendor Advisory
https://piwigo.org/release-16.3.0Release Notes

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.