Description
Contao is an Open Source CMS. From version 4.0.0 to before 4.13.57, before 5.3.42, and before 5.6.5, it is possible to inject code into the template output that will be executed in the browser in the front end and back end. This issue has been patched in versions 4.13.57, 5.3.42, and 5.6.5. A workaround for this issue involves not using the affected templates or patch them manually.
References (2)
Core 2
Core References
Vendor Advisory x_refsource_confirm
https://github.com/contao/contao/security/advisories/GHSA-68q5-78xp-cwwc
Vendor Advisory x_refsource_misc
https://contao.org/en/security-advisories/cross-site-scripting-in-templates
Scores
CVSS v3
3.3
EPSS
0.0014
EPSS Percentile
3.9%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-79
CWE-87
Status
published
Products (2)
contao/contao
4.0.0 - 4.13.57
contao/core-bundle
4.0.0 - 4.13.57Packagist
Published
Nov 25, 2025
Tracked Since
Feb 18, 2026