Vulnerability Details : CVE-2021-21340
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 .
Vulnerability category: Cross site scripting (XSS)
Products affected by CVE-2021-21340
- cpe:2.3:a:typo3:typo3:*:*:*:*:*:*:*:*
- cpe:2.3:a:typo3:typo3:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-21340
0.06%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 24 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-21340
Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
---|---|---|---|---|---|---|
3.5
|
LOW | AV:N/AC:M/Au:S/C:N/I:P/A:N |
6.8
|
2.9
|
NIST | |
5.4
|
MEDIUM | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N |
2.3
|
2.7
|
NIST | |
5.4
|
MEDIUM | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N |
2.3
|
2.7
|
GitHub, Inc. |
CWE ids for CVE-2021-21340
-
The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.Assigned by:
- nvd@nist.gov (Primary)
- security-advisories@github.com (Secondary)
References for CVE-2021-21340
-
https://packagist.org/packages/typo3/cms-backend
typo3/cms-backend - PackagistRelease Notes;Third Party Advisory
-
https://github.com/TYPO3/TYPO3.CMS/security/advisories/GHSA-fjh3-g8gq-9q92
Cross-Site Scripting in Content Preview (descriptionColumn) · Advisory · TYPO3/TYPO3.CMS · GitHubThird Party Advisory
-
https://typo3.org/security/advisory/typo3-core-sa-2021-007
TYPO3-CORE-SA-2021-007: Cross-Site Scripting in Content PreviewVendor Advisory
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