CVE-2021-37626

Name: CVE-2021-37626
Creator: NVD / NIST
Published: 2021-08-11T23:15:07.75+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.2/10EPSS 1.25%

Last modified Jun 17, 2026

CVE-2021-37626 is a high-severity vulnerability rated 7.2/10 on the CVSS scale. Contao is an open source CMS that allows you to create websites and scalable web applications. In affected versions it is possible to load PHP files by entering insert tags in the Contao back end. EPSS estimates a 1.25% chance of exploitation in the next 30 days.

Description

Contao is an open source CMS that allows you to create websites and scalable web applications. In affected versions it is possible to load PHP files by entering insert tags in the Contao back end. Installations are only affected if they have untrusted back end users who have the rights to modify fields that are shown in the front end. Update to Contao 4.4.56, 4.9.18 or 4.11.7 to resolve. If you cannot update then disable the login for untrusted back end users.

Metrics

CVSS 3.1

7.2/10

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

1.25%

65.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Contao	Contao	>= 4.4.0, < 4.4.56
Contao	Contao	>= 4.9.0, < 4.9.18
Contao	Contao	>= 4.11.0, < 4.11.7
Contao	Contao	4.0.0
Contao	Contao	4.1.0
Contao	Contao	4.2.0
Contao	Contao	4.3.0
Contao	Contao	4.5.0
Contao	Contao	4.6.0
Contao	Contao	4.7.0
Contao	Contao	4.8.0
Contao	Contao	4.10.0

References

https://contao.org/en/security-advisories/php-file-inclusion-via-insert-tags.htmlVendor Advisory
https://github.com/contao/contao/security/advisories/GHSA-r6mv-ppjc-4hgrThird Party Advisory
https://contao.org/en/security-advisories/php-file-inclusion-via-insert-tags.htmlVendor Advisory
https://github.com/contao/contao/security/advisories/GHSA-r6mv-ppjc-4hgrThird Party Advisory

Timeline

Published: Aug 11, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-37626?

How severe is CVE-2021-37626?

CVE-2021-37626 has a CVSS score of 7.2/10 (HIGH severity). The EPSS model estimates a 1.25% probability of exploitation in the next 30 days.

How do I fix CVE-2021-37626?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-37626?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST