Cross-Site Scripting in Content Preview
CVE-2021-21340

5.4MEDIUM

Key Information:

Vendor

Typo3

Status
Typo3.cms
Vendor
CVE Published:
23 March 2021

What is 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 .

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Deploy the Patch

Affected Version(s)

TYPO3.CMS >= 10.0.0, <= 10.4.13 <= 10.0.0, 10.4.13

TYPO3.CMS >= 11.0.0, <= 11.1.0 <= 11.0.0, 11.1.0

References

https://github.com/TYPO3/TYPO3.CMS/security/advisories/GH...
x_refsource_CONFIRM
https://packagist.org/packages/typo3/cms-backend
x_refsource_MISC
https://typo3.org/security/advisory/typo3-core-sa-2021-007
x_refsource_MISC

CVSS V3.1

Score:
5.4
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
Required
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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