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, back end users with precise control over the contents of template closures can execute arbitrary PHP functions that do not have required parameters. This issue has been patched in versions 4.13.57, 5.3.42, and 5.6.5. A workaround for this issue involves manually patching the Contao\Template::once() method.
CVSS Score
6.6
EPSS Score
0.0
Published
2025-11-25
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.
CVSS Score
3.3
EPSS Score
0.0
Published
2025-11-25
Contao is an Open Source CMS. In versions starting from 4.9.14 and prior to 4.13.56, 5.3.38, and 5.6.1, protected content elements that are rendered as fragments are indexed and become publicly available in the front end search. This issue has been patched in versions 4.13.56, 5.3.38, and 5.6.1. A workaround involves disabling the front end search.
CVSS Score
5.3
EPSS Score
0.0
Published
2025-08-28
Contao is an Open Source CMS. In versions starting from 5.0.0 and prior to 5.3.38 and 5.6.1, if a news feed contains protected news archives, their news items are not filtered and become publicly available in the RSS feed. This issue has been patched in versions 5.3.38 and 5.6.1. A workaround involves not adding protected news archives to the news feed page.
CVSS Score
5.3
EPSS Score
0.0
Published
2025-08-28
Contao is an Open Source CMS. In versions starting from 5.0.0 and prior to 5.3.38 and 5.6.1, the table access voter in the back end doesn't check if a user is allowed to access the corresponding module. This issue has been patched in versions 5.3.38 and 5.6.1. A workaround involves not relying solely on the voter and additionally to check USER_CAN_ACCESS_MODULE.
CVSS Score
4.3
EPSS Score
0.0
Published
2025-08-28
Contao is an Open Source CMS. In versions starting from 5.3.0 and prior to 5.3.38 and 5.6.1, under certain conditions, back end users may be able to edit fields of pages and articles without having the necessary permissions. This issue has been patched in versions 5.3.38 and 5.6.1. There are no workarounds.
CVSS Score
4.3
EPSS Score
0.0
Published
2025-08-28
Contao is an Open Source CMS. Users can upload SVG files with malicious code, which is then executed in the back end and/or front end. This vulnerability is fixed in Contao 4.13.54, 5.3.30, or 5.5.6.
CVSS Score
5.4
EPSS Score
0.001
Published
2025-03-18
Contao before 5.5.6 allows XSS via an SVG document. This affects (in contao/core-bundle in Composer) 4.x before 4.13.54, 5.0.x through 5.3.x before 5.3.30, and 5.4.x and 5.5..x before 5.5.6.
CVSS Score
6.4
EPSS Score
0.003
Published
2024-10-02
Contao is an Open Source CMS. In affected versions a back end user with access to the file manager can upload malicious files and execute them on the server. Users are advised to update to Contao 4.13.49, 5.3.15 or 5.4.3. Users unable to update are advised to configure their web server so it does not execute PHP files and other scripts in the Contao file upload directory.
CVSS Score
8.3
EPSS Score
0.002
Published
2024-09-17
Contao is an Open Source CMS. In affected versions authenticated users in the back end can list files outside the document root in the file selector widget. Users are advised to update to Contao 4.13.49. There are no known workarounds for this vulnerability.
CVSS Score
4.3
EPSS Score
0.006
Published
2024-09-17
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