CVE-2021-21339
Published:March 23, 2021
Updated:May 17, 2026
TYPO3 is an open source PHP based web content management system. In TYPO3 before versions 6.2.57, 7.6.51, 8.7.40, 9.5.25, 10.4.14, 11.1.1 user session identifiers were stored in cleartext - without processing of additional cryptographic hashing algorithms. This vulnerability cannot be exploited directly and occurs in combination with a chained attack - like for instance SQL injection in any other component of the system. This is fixed in versions 6.2.57, 7.6.51, 8.7.40, 9.5.25, 10.4.14, 11.1.1.
Affected Packages
typo3/cms-core (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-core (PHP):
Affected version(s) >=v9.0.0 <v9.5.25Fix Suggestion:
Update to version v9.5.25Related Resources (6)
Do you need more information?
Contact UsCVSS v4
Base Score:
8.2
Attack Vector
NETWORK
Attack Complexity
HIGH
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
NONE
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
5.9
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Weakness Type (CWE)
Cleartext Storage of Sensitive Information
EPSS
Base Score:
0.13