What is GHSA-xvg8-m4x3-w6xr?

GHSA-xvg8-m4x3-w6xr is a security advisory published by GitHub Security Advisories with Medium severity. matrix-js-sdk has insufficient MXC URI validation which allows client-side path traversal

Which CVE IDs does GHSA-xvg8-m4x3-w6xr cover?

GHSA-xvg8-m4x3-w6xr covers the following CVE IDs: CVE-2024-50336. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

Which products are affected by GHSA-xvg8-m4x3-w6xr?

GHSA-xvg8-m4x3-w6xr affects 1 product, including: npm/matrix-js-sdk:\u003c 34.11.1.

GHSA-xvg8-m4x3-w6xrMedium

matrix-js-sdk has insufficient MXC URI validation which allows client-side path traversal

Vendor

GitHub Security Advisories

Published

November 12, 2024

Last Modified

November 4, 2025

🔗 CVE IDs covered (1)

CVE-2024-50336 →

📋 Description

Summary

matrix-js-sdk before 34.11.0 is vulnerable to client-side path traversal via crafted MXC URIs. A malicious room member can trigger clients based on the matrix-js-sdk to issue arbitrary authenticated GET requests to the client's homeserver.

Details

The Matrix specification demands homeservers to perform validation of the server-name and media-id components of MXC URIs with the intent to prevent path traversal. However, it is not mentioned that a similar check must also be performed on the client to prevent client-side path traversal. matrix-js-sdk fails to perform this validation.

Patches

Fixed in matrix-js-sdk 34.11.1.

Workarounds

None.

References

https://spec.matrix.org/v1.12/client-server-api/#security-considerations-5
https://blog.doyensec.com/2024/07/02/cspt2csrf.html

🎯 Affected products1

npm/matrix-js-sdk:< 34.11.1