In Zammad 6.4.x before 6.4.2, SSRF can occur. Authenticated admin users can enable webhooks in Zammad, which are triggered as POST requests when certain conditions are met. If a webhook endpoint returned a redirect response, Zammad would follow it automatically with another GET request. This could be abused by an attacker to cause GET requests for example in the local network.
2025-04-05T21:15:40.487
2025-04-15T16:36:06.817
Analyzed
CVSSv3.1: 4.0 (MEDIUM)