Matrix Media Repo (MMR) allows Server-Side Request Forgery (SSRF) on redirects and federation
### Impact Matrix Media Repo (MMR) is vulnerable to server-side request forgery, serving content from a private network it can access, under certain conditions. ### Patches This is fixed in [MMR v1.3.8](https://github.com/t2bot/matrix-media-repo/releases/tag/v1.3.8). ### Workarounds Restricting which hosts MMR is allowed to contact via (local) firewall rules or a transparent proxy. ### References https://owasp.org/www-community/attacks/Server_Side_Request_Forgery https://learn.snyk.io/lesson/ssrf-server-side-request-forgery/ https://www.agwa.name/blog/post/preventing_server_side_request_forgery_in_golang
describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2024-52602US | medium5.3 | — | ||
Matrix Media Repo (MMR) is a highly configurable multi-homeserver media repository for Matrix. Matrix Media Repo (MMR) is vulnerable to server-side request forgery, serving content… | ||||
references
External citations — patches, advisories, analysis.
- https://github.com/t2bot/matrix-media-repoPACKAGE
- https://github.com/t2bot/matrix-media-repo/releases/tag/v1.3.8WEB
- https://github.com/t2bot/matrix-media-repo/security/advisories/GHSA-r6jg-jfv6-2fjvWEB
- https://learn.snyk.io/lesson/ssrf-server-side-request-forgeryWEB
- https://nvd.nist.gov/vuln/detail/CVE-2024-52602ADVISORY
- https://owasp.org/www-community/attacks/Server_Side_Request_ForgeryWEB
- https://pkg.go.dev/vuln/GO-2025-3399WEB
- https://www.agwa.name/blog/post/preventing_server_side_request_forgery_in_golangWEB
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