CVE Catalog

CVE-2026-53599

HighCVSS 7.5
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.31%

24th percentile - higher than 24% of all known CVEs

Summary

REDAXO from 5.18.2 through 5.21.1 allows an authenticated backend user with media[upload] permission to upload a JPEG/PHP polyglot file named shell.php.any.jpg, which web servers with multi-extension PHP handlers can execute as the web-server user.

Risk Assessment

An attacker can achieve remote code execution on the web server, leading to full system compromise.

Recommendation

Upgrade REDAXO to version 5.21.1 or later.

Related vulnerabilities

Original NVD description (English source)

REDAXO is a PHP-based content management system. From 5.18.2 until 5.21.1, rex_mediapool::isAllowedExtension in redaxo/src/addons/mediapool/lib/mediapool.php lets an authenticated backend user with media[upload] permission upload a JPEG/PHP polyglot named shell.php.any.jpg, which web servers with multi-extension PHP handlers can execute as the web-server user. This issue is fixed in version 5.21.1.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS