Skip to content

Cross-Site Scripting in Content Preview (CType menu)

Moderate
ohader published GHSA-x7hc-x7fm-f7qh Mar 16, 2021

Package

composer typo3/cms-backend (Composer)

Affected versions

7.0.0-7.6.50, 8.0.0-8.7.39, 9.0.0-9.5.24, 10.0.0-10.4.13, 11.0.0-11.1.0

Patched versions

7.6.51, 8.7.40, 9.5.25, 10.4.14, 11.1.1

Description

Meta

  • CVSS: AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:L/A:N/E:F/RL:O/RC:C (4.1)
  • CWE-79
  • Status: DRAFT

Problem

It has been discovered that content elements of type menu are vulnerable to cross-site scripting when their referenced items get previewed in the page module. A valid backend user account is needed to exploit this vulnerability.

Solution

Update to TYPO3 versions 7.6.51, 8.7.40, 9.5.25, 10.4.14, 11.1.1 that fix the problem described.

Credits

Thanks to TYPO3 contributor Oliver Bartsch who reported and fixed the issue.

References

Severity

Moderate

CVE ID

CVE-2021-21370

Weaknesses

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

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. Learn more on MITRE.

Credits