Medium severity · published Mar 23, 2021
CVE-2021-21340
TYPO3 is an open source PHP based web content management system
5.4
CVSS
0.9%
EPSS
No
On KEV
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 .
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.9% · higher than 59% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
TY
Typo3 · Typo3
10.0.0 before 10.4.14; 11.0.0 before 11.1.1 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-21340
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-21340
Third Party Advisory
https://github.com/TYPO3/TYPO3.CMS/security/advisories/GHSA-fjh3-g8gq-9q92
Release Notes
https://packagist.org/packages/typo3/cms-backend
Vendor Advisory
https://typo3.org/security/advisory/typo3-core-sa-2021-007
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TYPO3 is a free and open source Content Management Framework