Description
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 from a private network it can access, under certain conditions. This is fixed in MMR v1.3.8. Users are advised to upgrade. Restricting which hosts MMR is allowed to contact via (local) firewall rules or a transparent proxy and may provide a workaround for users unable to upgrade.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| t2bot | matrix-media-repo | < 1.3.8 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP6 | govulncheck-vulndb | 0.0.20250128T150132-150000.1.29.1 | SUSE-SU-2025:0297-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | govulncheck-vulndb | 0.0.20250117T214834-1.1 | openSUSE-SU-2025:14704-1 |
| openSUSE Leap 15.6 | govulncheck-vulndb | 0.0.20250128T150132-150000.1.29.1 | SUSE-SU-2025:0297-1 |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Go | github.com/t2bot/matrix-media-repo | < 1.3.8 | 1.3.8 | GHSA-r6jg-jfv6-2fjv |
Advisories 2
- SUSE-SU-2025:0297-1 Security update for govulncheck-vulndb SUSE / openSUSE Security Updates · Feb 5, 2026
- openSUSE-SU-2025:14704-1 govulncheck-vulndb-0.0.20250117T214834-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
References
- https://github.com/t2bot/matrix-media-repo/security/advisories/GHSA-r6jg-jfv6-2fjv
- https://github.com/t2bot/matrix-media-repo/releases/tag/v1.3.8
- https://learn.snyk.io/lesson/ssrf-server-side-request-forgery
- https://owasp.org/www-community/attacks/Server_Side_Request_Forgery
- https://www.agwa.name/blog/post/preventing_server_side_request_forgery_in_golang