Vulnerability · Published Feb 10, 2025 · Assigned by GitHub_M
CVE-2025-25194Server-Side Request Forgery (SSRF) in activitypub_federation
Medium 4.0
In plain English
A medium-severity server-side request forgery in lemmy from LemmyNet. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 36% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code.
Official description
Lemmy, a link aggregator and forum for the fediverse, is vulnerable to server-side request forgery via a dependency on activitypub_federation, a framework for ActivityPub federation in Rust. This vulnerability, which is present in versions 0.6.2 and prior of activitypub_federation and versions 0.19.8 and prior of Lemmy, allows a user to bypass any predefined hardcoded URL path or security anti-Localhost mechanism and perform an arbitrary GET request to any Host, Port and URL using a Webfinger Request. As of time of publication, a fix has not been made available.
Affected products (as reported)
Weakness: CWE-918 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:N/A:N
References
- https://github.com/LemmyNet/lemmy/security/advisories/GHSA-7723-35v7-qcxw x_refsource_CONFIRM