CVE-2026-82394

Received Received - Intake

Sulu CMS Preview Link Permission Bypass

Publication date: 2026-08-31

Last updated on: 2026-08-31

Assigner: GitHub, Inc.

Description

Sulu is an open-source PHP content management system based on the Symfony framework. Prior to versions 2.6.25 and 3.0.8, the preview-link endpoint and src/Sulu/Bundle/PreviewBundle/Application/Manager/PreviewLinkManager.php do not enforce VIEW permission for the target resource in PreviewLinkManager::generate() or PreviewLinkManager::revoke(). An authenticated administration user who knows a target resource identifier can create or revoke a preview link for any page, article, or snippet, including content in a webspace or area the user cannot view. A generated preview URL is public and resolves content by an opaque token, allowing the user or anyone receiving the link to read restricted content without authentication. This issue is fixed in versions 2.6.25 and 3.0.8.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-08-31

Last Modified

2026-08-31

Generated

2026-09-01

AI Q&A

2026-09-01

EPSS Evaluated

N/A

NVD

CVE-2026-82394

Affected Vendors & Products

Vendor	Product	Version / Range
sulu	sulu	to 2.6.25 (inc)
sulu	sulu	to 3.0.8 (inc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-863	The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.
CWE-862	The product does not perform an authorization check when an actor attempts to access a resource or perform an action.

Attack-Flow Graph

Executive Summary

This vulnerability affects Sulu, an open-source PHP content management system. It allows authenticated admin users to create or revoke preview links for any page, article, or snippet without proper VIEW permission enforcement. The preview URLs are public and can expose restricted content to unauthorized users.

Detection Guidance

Check Sulu versions for 2.6.x below 2.6.25 or 3.0.x below 3.0.8. Review logs for unauthorized preview link generation or access attempts. Inspect preview link tokens for unusual activity.

Impact Analysis

An attacker with admin access could generate preview links for restricted content and share them publicly. This could lead to unauthorized access to sensitive data, violating confidentiality and potentially causing data breaches.

Compliance Impact

This vulnerability could lead to unauthorized data exposure, violating GDPR's data protection principles and HIPAA's security requirements for protected health information. Organizations using affected Sulu versions may face compliance violations and legal penalties.

Mitigation Strategies

Upgrade Sulu to versions 2.6.25 or 3.0.8 or later. Review and revoke any suspicious preview links. Audit user permissions to ensure VIEW restrictions are enforced.

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