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MEDIUM severity

Matrix Media Repo (MMR) allows Server-Side Request Forgery (SSRF) on redirects and federationGHSA-r6jg-jfv6-2fjv

MEDIUM

GHSA-r6jg-jfv6-2fjv is a medium-severity (CVSS 5) Server-Side Request Forgery (SSRF) vulnerability in github.com/t2bot/matrix-media-repo. A fix is available for github.com/t2bot/matrix-media-repo — see the affected versions and patch details below.

Also known asCVE-2024-52602GO-2025-3399
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed
Exploitation data as of Nov 11, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

Proof-of-concept exploit code exists

  • CISA’s SSVC triage found public proof-of-concept exploit code for this CVE, though no confirmed active exploitation.

Exploitation and automatability from CISA’s SSVC triage for GHSA-r6jg-jfv6-2fjv.

EPSS Exploitation Probability

via FIRST.org ↗
0.6%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs49th percentile — riskier than 49% of all scored CVEsHighest risk
0.00%0.36%0.73%1.09%0.1%0.6%May 26Sep 26Nov 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

1 pkg affected
🐹github.com/t2bot/matrix-media-repo

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Go packages — download data is not available via public APIs for these ecosystems.

Description

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.

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

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
🐹Gogithub.com/t2bot/matrix-media-repoall versions1.3.8go get github.com/t2bot/matrix-media-repo@v1.3.8

Affected Products

1 product · 1 configurations
Application
matrix-media-repot2bot
< 1.3.8
range

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for github.com/t2bot/matrix-media-repo, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update github.com/t2bot/matrix-media-repo to 1.3.8 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-r6jg-jfv6-2fjv is resolved across your whole dependency graph.

  3. Workarounds

    Restrict outbound requests from the affected component to an allowlist of hosts, block access to link-local and internal address ranges at the network layer, and require authentication on internal services so a forged request cannot reach them unauthenticated.

Frequently Asked Questions

### 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_for
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Matrix Media Repo (MMR) allows Server-Side Request…