CVE-2026-24736
CRITICALCVSS Vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
Lifecycle Timeline
3Description
Squidex is an open source headless content management system and content management hub. Versions of the application up to and including 7.21.0 allow users to define "Webhooks" as actions within the Rules engine. The url parameter in the webhook configuration does not appear to validate or restrict destination IP addresses. It accepts local addresses such as 127.0.0.1 or localhost. When a rule is triggered (Either manual trigger by manually calling the trigger endpoint or by a content update or any other triggers), the backend server executes an HTTP request to the user-supplied URL. Crucially, the server logs the full HTTP response in the rule execution log (lastDump field), which is accessible via the API. Which turns a "Blind" SSRF into a "Full Read" SSRF. As of time of publication, no patched versions are available.
Analysis
Server-Side Request Forgery (SSRF) vulnerability in Squidex CMS webhook configuration allows authenticated administrators to make requests to internal services by specifying localhost or internal IP addresses as webhook destinations. PoC available.
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Remediation
Within 24 hours: Inventory all Squidex instances and document versions in use; disable webhook functionality in the Rules engine if operationally feasible. Within 7 days: Implement network segmentation to restrict Squidex outbound connections; enable detailed logging and monitoring of Rules engine activity; assess whether your version is affected (≤7.21.0). …
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External POC / Exploit Code
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