What’s Vulnerable › Vulnerabilities

CVE-2024-52602: Server-Side Request Forgery (SSRF) on redirects and federation in Matrix Media Repo

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-01-16 · updated 2026-06-17
• Weakness: CWE-918

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

• t2bot matrix-media-repo: before 1.3.8 — fixed in 1.3.8

How to fix

Upgrade to a fixed version: t2bot matrix-media-repo 1.3.8. Check the vendor advisory for mitigations.

References

• https://github.com/t2bot/matrix-media-repo/releases/tag/v1.3.8
• https://github.com/t2bot/matrix-media-repo/security/advisories/GHSA-r6jg-jfv6-2fjv
• 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

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