CVE-2020-26227

Name: CVE-2020-26227
Creator: NVD / NIST
Published: 2020-11-23T21:15:12.047+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.1/10EPSS 0.71%

Last modified Jun 17, 2026

CVE-2020-26227 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. TYPO3 is an open source PHP based web content management system. In TYPO3 before versions 9.5.23 and 10.4.10 the system extension Fluid (typo3/cms-fluid) of the TYPO3 core is vulnerable to cross-site scripting passing user-controlled data as argument to Fluid view helpers. EPSS estimates a 0.71% chance of exploitation in the next 30 days.

Description

TYPO3 is an open source PHP based web content management system. In TYPO3 before versions 9.5.23 and 10.4.10 the system extension Fluid (typo3/cms-fluid) of the TYPO3 core is vulnerable to cross-site scripting passing user-controlled data as argument to Fluid view helpers. Update to TYPO3 versions 9.5.23 or 10.4.10 that fix the problem described.

Metrics

CVSS 3.1

6.1/10

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

EPSS Probability

0.71%

49.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Typo3	Typo3	>= 6.2.0, < 6.2.54
Typo3	Typo3	>= 7.6.0, < 7.6.48
Typo3	Typo3	>= 8.7.0, < 8.7.38
Typo3	Typo3	>= 9.0.0, < 9.5.23
Typo3	Typo3	>= 10.0.0, < 10.4.10

References

https://github.com/TYPO3/TYPO3.CMS/security/advisories/GHSA-vqqx-jw6p-q3rfExploit, Third Party Advisory
https://typo3.org/security/advisory/typo3-core-sa-2020-010Exploit, Vendor Advisory
https://github.com/TYPO3/TYPO3.CMS/security/advisories/GHSA-vqqx-jw6p-q3rfExploit, Third Party Advisory
https://typo3.org/security/advisory/typo3-core-sa-2020-010Exploit, Vendor Advisory

Timeline

Published: Nov 23, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-26227?

How severe is CVE-2020-26227?

CVE-2020-26227 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 0.71% probability of exploitation in the next 30 days.

How do I fix CVE-2020-26227?

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-2020-26227?

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

Scan your code now

Source: NVD / NIST