CVE-2025-47936 – typo3/cms-webhooks

Package

Manager: composer
Name: typo3/cms-webhooks
Vulnerable Version: >=12.0.0 <12.4.31 || >=13.0.0 <13.4.12

Severity

Level: Low

CVSS v3.1: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:L/A:L

CVSS v4.0: CVSS:4.0/AV:N/AC:H/AT:N/PR:H/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N

EPSS: 0.00037 pctl0.09901

Details

TYPO3 CMS Webhooks Server Side Request Forgery ### Problem Webhooks are inherently vulnerable to Server-Side Request Forgery (SSRF), which can be exploited by adversaries to target internal resources (e.g., _localhost_ or other services on the local network). While this is not a vulnerability in TYPO3 itself, it may enable attackers to blindly access systems that would otherwise be inaccessible. An administrator-level backend user account is required to exploit this vulnerability. ### Solution Update to TYPO3 versions 12.4.31 LTS, 13.4.12 LTS that fix the problem described. > [!IMPORTANT] > > **Manual actions required** > > To mitigate potential SSRF risks via webhooks, it is recommended to explicitly allow access only to trusted hosts. This can be achieved by configuring the allowlist in `$GLOBALS['TYPO3_CONF_VARS']['HTTP']['allowed_hosts']['webhooks']`. > > If the allowlist is not defined or set to `null`, all requests will be allowed. > If the allowlist is an empty `array`, all requests will be blocked. > > By default, the factory setting allows all requests. This prevents existing webhooks from failing after upgrading to the affected TYPO3 versions. Administrators must configure this setting manually to enforce restrictions. ### Credits Thanks to the National Cyber Security Center (NCSC) of Switzerland for reporting this issue, and to TYPO3 core & security team member Benjamin Franzke for fixing it.

Metadata

Created: 2025-05-20T19:20:55Z
Modified: 2025-05-20T19:20:55Z
Source: https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/05/GHSA-p4xx-m758-3hpx/GHSA-p4xx-m758-3hpx.json
CWE IDs: ["CWE-918"]
Alternative ID: GHSA-p4xx-m758-3hpx
Finding: F100
Auto approve: 1