Is this vulnerability remotely exploitable?

Yes. If the Piwigo instance is reachable over the network, an unauthenticated remote user can query the `pwg.history.search` API and obtain browsing history data.

What level of access does an attacker need?

Only basic network access to the Piwigo API is required. No user account, session, or prior authentication is needed to exploit the missing authorization on this endpoint.

What is the safest general fix pattern?

Apply strict authorization to the `pwg.history.search` method, limiting it to trusted roles (such as administrators), and ensure that all similar endpoints explicitly declare and enforce their access requirements via a centralized authorization mechanism.

Severity:

HIGH RISK

(7.5)

Missing Authorization (CWE-862) in Piwigo pwg.history.search API Exposes User Browsing History

CVE-2026-27833

Published:

Apr 3, 2026

Status:

Analyzed

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

NDV

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Vulnerability Type

Category:

Missing Authorization

CWE:

CWE-862

Impact:

Unauthorized Access to Sensitive User Activity Data

Severity:

HIGH RISK

(7.5)

CVSS Version:

3.1

Vulnerability Type

Category:

Missing Authorization

CWE:

CWE-862

Impact:

Unauthorized Access to Sensitive User Activity Data

Severity:

HIGH RISK

(7.5)

CVSS Version:

3.1

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Missing Authorization (CWE-862) in Piwigo pwg.history.search API Exposes User Browsing History

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

Recent Vulnerabilities

HIGH RISK

HIGH

(8.8)

PHP Code Injection via File Upload (CWE-94) in Aero CMS Admin Post Creation

HIGH RISK

HIGH

(8.8)

Code Injection (CWE-94) via Module Parameters in Evolution CMS

Vulnerability Type

Vulnerability Type

Vulnerability Type

Catch This CVE While Code Is Being Written

Ship clean & secure code faster

Ship clean & secure code faster

Ship clean & secure code faster

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