CVE-2021-21358

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in typo3/cms-form

Description

TYPO3 is an open source PHP based web content management system. In TYPO3 before versions 10.4.14, 11.1.1 it has been discovered that the Form Designer backend module of the Form Framework is vulnerable to cross-site scripting. A valid backend user account with access to the form module is needed to exploit this vulnerability. This is fixed in versions 10.4.14, 11.1.1.

Category

5.4
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.38%
Vendor Advisory typo3.org
Affected: TYPO3 TYPO3.CMS
Published at:
Updated at:

References

Link Tags
https://github.com/TYPO3/TYPO3.CMS/security/advisories/GHSA-x79j-wgqv-g8h2 third party advisory
https://packagist.org/packages/typo3/cms-form third party advisory release notes
https://typo3.org/security/advisory/typo3-core-sa-2021-004 vendor advisory

Frequently Asked Questions

What is the severity of CVE-2021-21358?
CVE-2021-21358 has been scored as a medium severity vulnerability.
How to fix CVE-2021-21358?
To fix CVE-2021-21358, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-21358 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-21358 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-21358?
CVE-2021-21358 affects TYPO3 TYPO3.CMS.
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