Debug Log Manager <= 2.5.2 - Unauthenticated Stored Cross-Site Scripting via JavaScript Error Log Details

ID

WPSEC-2026-1291

Plugin

Debug Log Manager – Conveniently Monitor and Inspect Errors (debug-log-manager)

Affected

all versions before 2.5.3

Remediation

Update to 2.5.3 or later.

CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

Weakness

CWE-79

Usage

Plugin Low · Affected versions Low among sites WPSec scans, 2026-10-21

Attack surface

Debug Log Manager on WPSec AttackSurface

Fix released

2026-10-19

Published

2026-10-21

Description

The Debug Log Manager plugin for WordPress is vulnerable to Stored Cross-Site Scripting via JavaScript error log details submitted to the 'log_js_errors' handler in all versions up to, and including, 2.5.2. This is due to insufficient input sanitization of encoded markup (JSON unicode escapes and HTML entities), which survives sanitize_text_field() and is later decoded, and to missing output escaping of log entry details and JSON-formatted log dumps in the log viewer and its auto-refresh. This makes it possible for unauthenticated attackers to inject arbitrary web scripts that execute when an administrator views the debug log page, provided JavaScript error logging is enabled.

References

• https://wpsec.com/vuln/WPSEC-2026-1291/
• https://plugins.svn.wordpress.org/debug-log-manager/tags/2.5.3/
• https://wordpress.org/plugins/debug-log-manager/

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