CVE-2026-27833

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

HIGH
7.5
CVSS Score
Published: April 3, 2026 at 09:34 PM UTC
Updated: July 24, 2026 at 10:20 PM UTC
1 product affected across 1 vendorPiwigo

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Severity
HIGH7.5
Exploit prediction
EPSS 2%
SSVC
PoC

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 16.3.0
Affected range stops below 16.3.0, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (3)

x_refsource_CONFIRMExploitVendor Advisory
Source: cverecord
https://github.com/Piwigo/Piwigo/security/advisories/GHSA-397m-gfhm-pmg2
x_refsource_MISCRelease Notes
Source: cverecord
https://piwigo.org/release-16.3.0

SSVC — Action Prioritization

SSVCPoCAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.5HIGHGitHub_M
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusANALYZED
CWE
CWE-862

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