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GHSA-8wg7-wm29-2rvghigh8.5

RCE via SSTI for users with permissions to access the Craft CMS Webhooks plugin

Impact

The Webhooks plugin renders user-supplied template content through Twig’s renderString() function without sandbox protection. This allows an authenticated user with access to the Craft control panel and permissions to access the Webhooks plugin to inject Twig template code that calls arbitrary PHP functions.

Source excerpt · OSV

Affected packages

Start with the recorded fix for your release branch. Check your installed version and test compatibility before upgrading. Fixing this advisory does not rule out other vulnerabilities in the release.

craftcms/webhooks Packagist
Affected rangeRecorded fix
From 3.0.0 before 3.2.0Ecosystem versions3.2.0

Version evidence: OSV · GHSA-8wg7-wm29-2rvg

View original version evidence (8 explicit versions)

Original source description

The Webhooks plugin renders user-supplied template content through Twig’s renderString() function without sandbox protection. This allows an authenticated user with access to the Craft control panel and permissions to access the Webhooks plugin to inject Twig template code that calls arbitrary PHP functions.

This is possible even if allowAdminChanges is set to false.

Affected users should update to version 3.2.0 to mitigate the issue.

References