WS-2018-0155
Published:May 14, 2026
Updated:May 14, 2026
In TYPO3, versions 7.0.0 to 7.6.29, 8.0.0 to 8.7.16 and 9.0.0 to 9.3.0, Phar files (formerly known as 'PHP archives') can act as self extracting archives which leads to the fact that source code is executed when Phar files are invoked. The Phar file format is not limited to be stored with a dedicated file extension - 'bundle.phar' would be valid as well as 'bundle.txt' would be. This way, Phar files can be obfuscated as image or text file which would not be denied from being uploaded and persisted to a TYPO3 installation. Due to a missing sanitization of user input, those Phar files can be invoked by manipulated URLs in TYPO3 backend forms. A valid backend user account is needed to exploit this vulnerability. In theory the attack vector would be possible in the TYPO3 frontend as well, however no functional exploit has been identified so far.
Affected Packages
typo3/cms (PHP):
Affected version(s) =8.7.1 <8.7.2Fix Suggestion:
Update to version 8.7.2typo3/cms (PHP):
Affected version(s) =v7.6.20 <7.6.21Fix Suggestion:
Update to version 7.6.21typo3/cms-core (PHP):
Affected version(s) =v9.3.0 <v9.3.1Fix Suggestion:
Update to version v9.3.1instituteweb/typo3-cms (PHP):
Affected version(s) >=7.6.11 <8.0.0Fix Suggestion:
Update to version 8.0.0typo3/cms (PHP):
Affected version(s) =8.6.0 <8.6.1Fix Suggestion:
Update to version 8.6.1typo3/cms (PHP):
Affected version(s) =v7.6.28 <7.6.29Fix Suggestion:
Update to version 7.6.29typo3/cms (PHP):
Affected version(s) >=TYPO3_8-7-1 <TYPO3_8-7-3Fix Suggestion:
Update to version TYPO3_8-7-3typo3/cms (PHP):
Affected version(s) =v8.7.15 <8.7.16Fix Suggestion:
Update to version 8.7.16typo3/cms (PHP):
Affected version(s) =v8.7.12 <8.7.13Fix Suggestion:
Update to version 8.7.13instituteweb/typo3-cms (PHP):
Affected version(s) >=8.4.0 <=8.7.10Fix Suggestion:
Update to version no_fixtypo3/cms (PHP):
Affected version(s) >=v9.0.0 <9.3.x-devFix Suggestion:
Update to version 9.3.x-devtypo3/cms (PHP):
Affected version(s) =v7.6.29 <7.6.30Fix Suggestion:
Update to version 7.6.30typo3/cms (PHP):
Affected version(s) >=TYPO3_8-4-0 <dev-TYPO3_8-7Fix Suggestion:
Update to version dev-TYPO3_8-7instituteweb/typo3-cms (PHP):
Affected version(s) >=dev-TYPO3_7 <6.2.19Fix Suggestion:
Update to version 6.2.19typo3/cms (PHP):
Affected version(s) =v9.3.0 <v9.3.1Fix Suggestion:
Update to version v9.3.1typo3/cms-core (PHP):
Affected version(s) >=v8.7.7 <v8.7.17Fix Suggestion:
Update to version v8.7.17typo3/cms (PHP):
Affected version(s) =v7.6.27 <7.6.28Fix Suggestion:
Update to version 7.6.28typo3/cms (PHP):
Affected version(s) =v8.7.5 <8.7.6Fix Suggestion:
Update to version 8.7.6typo3/cms-rsaauth (PHP):
Affected version(s) >=v9.0.0 <9.3.x-devFix Suggestion:
Update to version 9.3.x-devtypo3/cms (PHP):
Affected version(s) =v8.7.10 <8.7.11Fix Suggestion:
Update to version 8.7.11typo3/cms-rsaauth (PHP):
Affected version(s) >=v8.7.7 <v8.7.17Fix Suggestion:
Update to version v8.7.17typo3/cms (PHP):
Affected version(s) >=7.6.17 <7.6.19Fix Suggestion:
Update to version 7.6.19typo3/cms (PHP):
Affected version(s) =v8.7.6 <8.7.7Fix Suggestion:
Update to version 8.7.7typo3/cms (PHP):
Affected version(s) =v8.7.4 <8.7.5Fix Suggestion:
Update to version 8.7.5typo3/cms (PHP):
Affected version(s) =v7.6.25 <7.6.26Fix Suggestion:
Update to version 7.6.26typo3/cms (PHP):
Affected version(s) =v8.7.13 <8.7.14Fix Suggestion:
Update to version 8.7.14typo3/cms-core (PHP):
Affected version(s) >=v9.0.0 <9.3.x-devFix Suggestion:
Update to version 9.3.x-devtypo3/cms (PHP):
Affected version(s) =7.6.15 <7.6.16Fix Suggestion:
Update to version 7.6.16typo3/cms-rsaauth (PHP):
Affected version(s) =v9.3.0 <v9.3.1Fix Suggestion:
Update to version v9.3.1typo3/cms (PHP):
Affected version(s) =v7.6.26 <7.6.27Fix Suggestion:
Update to version 7.6.27typo3/cms (PHP):
Affected version(s) =v7.6.22 <7.6.23Fix Suggestion:
Update to version 7.6.23typo3/cms (PHP):
Affected version(s) =v8.7.3 <8.7.4Fix Suggestion:
Update to version 8.7.4typo3/cms (PHP):
Affected version(s) =v7.6.24 <7.6.25Fix Suggestion:
Update to version 7.6.25typo3/cms (PHP):
Affected version(s) =v8.7.9 <8.7.10Fix Suggestion:
Update to version 8.7.10typo3/cms (PHP):
Affected version(s) =7.6.12 <7.6.13Fix Suggestion:
Update to version 7.6.13typo3/cms (PHP):
Affected version(s) =v8.7.8 <8.7.9Fix Suggestion:
Update to version 8.7.9typo3/cms (PHP):
Affected version(s) =v7.6.21 <7.6.22Fix Suggestion:
Update to version 7.6.22typo3/cms (PHP):
Affected version(s) =v7.6.23 <7.6.24Fix Suggestion:
Update to version 7.6.24typo3/cms (PHP):
Affected version(s) =8.4.1 <8.5.0Fix Suggestion:
Update to version 8.5.0typo3/cms (PHP):
Affected version(s) =v8.7.16 <8.7.17Fix Suggestion:
Update to version 8.7.17typo3/cms (PHP):
Affected version(s) =v8.7.7 <8.7.8Fix Suggestion:
Update to version 8.7.8typo3/cms (PHP):
Affected version(s) =v8.7.11 <8.7.12Fix Suggestion:
Update to version 8.7.12typo3/cms (PHP):
Affected version(s) >=TYPO3_7-6-11 <TYPO3_7-6-20Fix Suggestion:
Update to version TYPO3_7-6-20typo3/cms (PHP):
Affected version(s) =v8.7.14 <8.7.15Fix Suggestion:
Update to version 8.7.15Related Resources (3)
Do you need more information?
Contact UsCVSS v4
Base Score:
8.7
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
LOW
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:
8.8
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH