GitHub Advisoryadvisory · Packagist
GHSA-fjh3-g8gq-9q92 Cross-Site Scripting in Content Preview
MEDIUM
Official page ↗
- Aliases
- CVE-2021-21340
- Ecosystem
- Packagist
- Packages
- typo3/cms-backend, typo3/cms-core, typo3/cms
- Severity
- Moderate
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
- Weaknesses
- CWE-79
- Reviewed
- 2021-03-23
Affected packages
• Packagist typo3/cms-backend: >= 10.0.0, < 10.4.14 → fixed in 10.4.14
• Packagist typo3/cms-backend: >= 11.0.0, < 11.1.1 → fixed in 11.1.1
• Packagist typo3/cms-core: >= 10.0.0, < 10.4.14 → fixed in 10.4.14
• Packagist typo3/cms-core: >= 11.0.0, < 11.1.1 → fixed in 11.1.1
• Packagist typo3/cms: >= 10.0.0, < 10.4.14 → fixed in 10.4.14
• Packagist typo3/cms: >= 11.0.0, < 11.1.1 → fixed in 11.1.1
Description
Problem
It has been discovered that database fields used as _descriptionColumn_ are vulnerable to cross-site scripting when their content gets previewed in the page module. A valid backend user account is needed to exploit this vulnerability.
Solution
Update to TYPO3 versions 10.4.14, 11.1.1 that fix the problem described.
Credits
Thanks to Richie Lee who reported this issue and to TYPO3 framework merger Andreas Fernandez who fixed the issue.
References
• TYPO3-CORE-SA-2021-007
Related
Alias · CVE (1)
- CVE-2021-21340 TYPO3 is an open source PHP based web content management system. vulnerability
Weakness · CWE (1)
- CWE-79 Improper Neutralization of Input During Web Page Generation weakness
References
- https://github.com/TYPO3/TYPO3.CMS/security/advisories/GHSA-fjh3-g8gq-9q92 web
- https://nvd.nist.gov/vuln/detail/CVE-2021-21340 advisory
- https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms-core/CVE-2021-21340.yaml web
- https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms/CVE-2021-21340.yaml web
- https://packagist.org/packages/typo3/cms-backend web
- https://typo3.org/security/advisory/typo3-core-sa-2021-007 web