CVE-2021-21370
Published:March 23, 2021
Updated:May 17, 2026
TYPO3 is an open source PHP based web content management system. In TYPO3 before versions 7.6.51, 8.7.40, 9.5.25, 10.4.14, 11.1.1 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. This is fixed in versions 7.6.51, 8.7.40, 9.5.25, 10.4.14, 11.1.1.
Affected Packages
typo3/cms-core (PHP):
Affected version(s) >=v9.0.0 <v9.5.25Fix Suggestion:
Update to version v9.5.25typo3/cms-backend (PHP):
Affected version(s) >=v9.0.0 <v9.5.25Fix Suggestion:
Update to version v9.5.25typo3/cms-core (PHP):
Affected version(s) >=v11.0.0 <v11.1.1Fix Suggestion:
Update to version v11.1.1typo3/cms-backend (PHP):
Affected version(s) >=v11.0.0 <v11.1.1Fix Suggestion:
Update to version v11.1.1typo3/cms-core (PHP):
Affected version(s) >=v10.0.0 <v10.4.14Fix Suggestion:
Update to version v10.4.14typo3/cms-backend (PHP):
Affected version(s) >=v10.0.0 <v10.4.14Fix Suggestion:
Update to version v10.4.14Additional Notes
The description of this vulnerability differs from MITRE.
Related Resources (6)
Do you need more information?
Contact UsCVSS v4
Base Score:
5.1
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
PASSIVE
Vulnerable System Confidentiality
LOW
Vulnerable System Integrity
LOW
Vulnerable System Availability
NONE
Subsequent System Confidentiality
LOW
Subsequent System Integrity
LOW
Subsequent System Availability
NONE
CVSS v3
Base Score:
5.4
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Weakness Type (CWE)
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
EPSS
Base Score:
0.34