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. Prior to version 0.19.16, the GET /api/v4/image/{filename} endpoint is vulnerable to unauthenticated SSRF through parameter injection in the file_type query parameter. An attacker can inject arbitrary query parameters into the internal request to pict-rs, including the proxy parameter which causes pict-rs to fetch arbitrary URLs. This issue has been patched in version 0.19.16.
Problem types
CWE-918: Server-Side Request Forgery (SSRF)
Product status
References
github.com/.../lemmy/security/advisories/GHSA-jvxv-2jjp-jxc3
github.com/.../lemmy/security/advisories/GHSA-jvxv-2jjp-jxc3
github.com/...ommit/f47a03f56d1797bceab5f34b6f624c91cecd5871