TYPO3 Arbitrary Code Execution via File List Module
Due to missing file extensions in $GLOBALS['TYPO3_CONF_VARS']['BE'][‘fileDenyPattern’], backend users are allowed to upload *.phar, *.shtml, *.pl or *.cgi files which can be executed in certain web server setups. A valid backend user account is needed in order to exploit this vulnerability.
Derivatives of Debian GNU Linux are handling *.phar files as PHP applications since PHP 7.1 (for unofficial packages) and PHP 7.2 (for official packages).
The file extension *.shtml is bound to server side includes which are not enabled per default in most common Linux based distributions. File extension *.pl and *.cgi require additional handlers to be configured which is also not the case in most common distributions (except for /cgi-bin/ location).
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Composer package | typo3/cms-core | >= 8.0.0, < 8.7.23, >= 9.0.0, < 9.5.4 | 8.7.23, 9.5.4 |
References
- https://github.com/TYPO3-CMS/core/commit/45c311d120c359d54cc918e962c374e774239899
- https://github.com/TYPO3-CMS/core/commit/5095084efae471c5fef7b578f2bc8a5060e1e148
- https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms-core/2019-01-22-7.yaml
- https://github.com/TYPO3-CMS/core
- https://typo3.org/security/advisory/typo3-core-sa-2019-008
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H- Weakness (CWE)
CWE-434- Platform
- Composer
- Package
typo3/cms-core- Disclosed
- 30.05.2024
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-f9hr-7cfq-mjg2 - CC BY 4.0
Vulnerability history: typo3/cms-core
All published vulnerabilities of this package (Composer package), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 128
- First → latest
- 09.2018 09.2026
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- Critical 1
- High 35
- Medium 84
- Low 8
Disclosures per year
- 2018: 2
- 2019: 0
- 2020: 13
- 2021: 15
- 2022: 34
- 2023: 3
- 2024: 38
- 2025: 8
- 2026: 15
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TYPO3 Arbitrary Code Execution via File List Module this entry
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