WS-2018-0157
Published:May 14, 2026
Updated:May 14, 2026
In TYPO3 's Form Framework, versions 8.5.0 to 8.7.16 and 9.0.0 to 9.3.0, is vulnerable to Insecure Deserialization when being used with the additional PHP PECL package “yaml”, which is capable of unserializing YAML contents to PHP objects. A valid backend user account as well as having PHP setting "yaml.decode_php" enabled is needed to exploit this vulnerability (which is the default value according to PHP documentation).
Affected Packages
typo3/cms (PHP):
Affected version(s) =v9.3.0 <v9.3.1Fix Suggestion:
Update to version v9.3.1typo3/cms (PHP):
Affected version(s) =TYPO3_8-7-0 <dev-TYPO3_8-7Fix Suggestion:
Update to version dev-TYPO3_8-7typo3/cms (PHP):
Affected version(s) =v8.7.5 <8.7.6Fix Suggestion:
Update to version 8.7.6typo3/cms (PHP):
Affected version(s) =v8.7.12 <8.7.13Fix Suggestion:
Update to version 8.7.13typo3/cms (PHP):
Affected version(s) =v8.7.3 <8.7.4Fix Suggestion:
Update to version 8.7.4typo3/cms (PHP):
Affected version(s) =v8.7.10 <8.7.11Fix Suggestion:
Update to version 8.7.11instituteweb/typo3-cms (PHP):
Affected version(s) >=8.7.0 <=8.7.10Fix Suggestion:
Update to version no_fixinstituteweb/typo3-cms (PHP):
Affected version(s) =dev-TYPO3_8 <6.2.19Fix Suggestion:
Update to version 6.2.19typo3/cms (PHP):
Affected version(s) =v8.7.14 <8.7.15Fix Suggestion:
Update to version 8.7.15typo3/cms-form (PHP):
Affected version(s) =v9.3.0 <v9.3.1Fix Suggestion:
Update to version v9.3.1typo3/cms (PHP):
Affected version(s) =v8.7.15 <8.7.16Fix Suggestion:
Update to version 8.7.16typo3/cms (PHP):
Affected version(s) =v8.7.7 <8.7.8Fix Suggestion:
Update to version 8.7.8typo3/cms (PHP):
Affected version(s) =v8.7.13 <8.7.14Fix Suggestion:
Update to version 8.7.14typo3/cms (PHP):
Affected version(s) >=v9.0.0 <9.3.x-devFix Suggestion:
Update to version 9.3.x-devtypo3/cms-form (PHP):
Affected version(s) >=v9.0.0 <9.3.x-devFix Suggestion:
Update to version 9.3.x-devtypo3/cms (PHP):
Affected version(s) =v8.7.6 <8.7.7Fix Suggestion:
Update to version 8.7.7typo3/cms (PHP):
Affected version(s) =8.7.1 <8.7.2Fix Suggestion:
Update to version 8.7.2typo3/cms-form (PHP):
Affected version(s) >=v8.7.7 <v8.7.17Fix Suggestion:
Update to version v8.7.17typo3/cms (PHP):
Affected version(s) =v8.7.8 <8.7.9Fix Suggestion:
Update to version 8.7.9typo3/cms (PHP):
Affected version(s) =v8.7.9 <8.7.10Fix Suggestion:
Update to version 8.7.10typo3/cms (PHP):
Affected version(s) =v8.7.4 <8.7.5Fix Suggestion:
Update to version 8.7.5typo3/cms (PHP):
Affected version(s) =v8.7.16 <8.7.17Fix Suggestion:
Update to version 8.7.17typo3/cms (PHP):
Affected version(s) =v8.7.11 <8.7.12Fix Suggestion:
Update to version 8.7.12typo3/cms (PHP):
Affected version(s) >=TYPO3_8-7-1 <TYPO3_8-7-3Fix Suggestion:
Update to version TYPO3_8-7-3Related Resources (1)
Do you need more information?
Contact UsCVSS v4
Base Score:
8.6
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
HIGH
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
7.2
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH