CVE-2021-21340

Sep 3, 2024

Published Date: 2021-03-23T02:15Z

Last Modified: 2021-03-26T18:42Z

CVSS Score: 5.4 (MEDIUM)

EPSS Score: 0.06%

Risk Score: 3.78 (MEDIUM)

Risk Score based on CVSS score and EPSS. This score is for reference purposes and is not internationally recognized.

CVSS: 5.4 | EPSS: 0.06%

NVD Links:

https://nvd.nist.gov/vuln/detail/CVE-2021-21340

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 database fields used as _descriptionColumn_ are vulnerable to cross-site scripting when their content gets previewed. A valid backend user account is needed to exploit this vulnerability. This is fixed in versions 10.4.14, 11.1.1 .

Mitre ATT&CK Technical v15.1

T1153 – Source
T1064 – Scripting
T1053.002 – At

Technical Analysis & Mitigation Measures

Reference Links

https://typo3.org/security/advisory/typo3-core-sa-2021-007
https://github.com/TYPO3/TYPO3.CMS/security/advisories/GHSA-fjh3-g8gq-9q92
https://packagist.org/packages/typo3/cms-backend

Vendor - Produce - Version

typo3 - typo3, typo3 - typo3

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