GitHub Advisoryadvisory · npm
GHSA-xvg8-m4x3-w6xr matrix-js-sdk has insufficient MXC URI validation which allows client-side path traversal
MEDIUM
Official page ↗
- Aliases
- CVE-2024-50336
- Ecosystem
- npm
- Packages
- matrix-js-sdk
- Severity
- Moderate
- CVSS vector
- CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:L/SA:N
- Weaknesses
- CWE-22
- Reviewed
- 2024-11-12
Affected packages
• npm matrix-js-sdk: < 34.11.1 → fixed in 34.11.1
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
Related
Alias · CVE (1)
- CVE-2024-50336 matrix-js-sdk is a Matrix messaging protocol Client-Server SDK for JavaScript. vulnerability
Weakness · CWE (1)
- CWE-22 Improper Limitation of a Pathname to a Restricted Directory weakness
References
- https://github.com/matrix-org/matrix-js-sdk/security/advisories/GHSA-xvg8-m4x3-w6xr web
- https://nvd.nist.gov/vuln/detail/CVE-2024-50336 advisory
- https://github.com/matrix-org/matrix-js-sdk package
- https://lists.debian.org/debian-lts-announce/2025/01/msg00004.html web
- https://spec.matrix.org/v1.12/client-server-api/#security-considerations-5 web