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CRITICAL severity

Missing Access Check in TYPO3 CMSGHSA-gwfx-p7mr-f92v

CRITICAL

GHSA-gwfx-p7mr-f92v is a critical-severity (CVSS 9) remote code execution vulnerability in typo3/cms. A fix is available for typo3/cms — see the affected versions and patch details below.

Published
Updated
Affected
3 pkgs
Patched
3 / 3
Exploits
None indexed
Exploitation data as of Dec 2, 2024 · OSV.dev, FIRST.org (EPSS)

Real-World Exposure

3 pkgs affected
🐘typo3/cms🐘typo3/cms🐘typo3/cms

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Packagist packages — download data is not available via public APIs for these ecosystems.

Description

Extbase request handling fails to implement a proper access check for requested controller/ action combinations, which makes it possible for an attacker to execute arbitrary Extbase actions by crafting a special request. To successfully exploit this vulnerability, an attacker must have access to at least one Extbase plugin or module action in a TYPO3 installation. The missing access check inevitably leads to information disclosure or remote code execution, depending on the action that an attacker is able to execute.

Affected Packages

3 total 3 fixed
EcosystemPackageVulnerable rangeFix
🐘Packagisttypo3/cms≥ 6.2.0&&< 6.2.256.2.25composer require typo3/cms:^6.2.25
🐘Packagisttypo3/cms≥ 7.6.0&&< 7.6.87.6.8composer require typo3/cms:^7.6.8
🐘Packagisttypo3/cms≥ 8.0.0&&< 8.1.18.1.1composer require typo3/cms:^8.1.1

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for typo3/cms, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update typo3/cms to 6.2.25 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-gwfx-p7mr-f92v is resolved across your whole dependency graph.

  3. Workarounds

    Assume what was exposed is already known: rotate any credential, token or key that the affected component could return, restrict the endpoint to callers that genuinely need it, and strip sensitive fields from responses and error output at the boundary rather than relying on the client not to read them.

Frequently Asked Questions

Extbase request handling fails to implement a proper access check for requested controller/ action combinations, which makes it possible for an attacker to execute arbitrary Extbase actions by crafting a special request. To successfully exploit this vulnerability, an attacker must have access to at least one Extbase plugin or module action in a TYPO3 installation. The missing access check inevitably leads to information disclosure or remote code execution, depending on the action that an attacker is able to execute.
O3 Security · Impact-Aware SCA

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Missing Access Check in TYPO3 CMS (Critical 9)