CVE-2021-43836: Sulu

High severity, CVSS 8.8. EPSS: 2% chance of exploitation in the next 30 days.

Sulu is an open-source PHP content management system based on the Symfony framework. In affected versions an attacker can read arbitrary local files via a PHP file include. In a default configuration this also leads to remote code execution. The problem is patched with the Versions 1.6.44, 2.2.18, 2.3.8, 2.4.0. For users unable to upgrade overwrite the service `sulu_route.generator.expression_token_provider` and wrap the translator before passing it to the expression language.

Affected products

• Sulu Sulu: before 1.6.44 (fixed in 1.6.44); from 2.0.0, before 2.2.18 (fixed in 2.2.18); from 2.3.0, before 2.3.8 (fixed in 2.3.8); version 2.4.0 only

Published 2021-12-15. Last modified 2026-06-17.