CVE-2025-48937

matrix-sdk-crypto vulnerable to sender of encrypted events being spoofed by homeserver administrator

Description

matrix-rust-sdk is an implementation of a Matrix client-server library in Rust. matrix-sdk-crypto since version 0.8.0 and up to 0.11.0 does not correctly validate the sender of an encrypted event. Accordingly, a malicious homeserver operator can modify events served to clients, making those events appear to the recipient as if they were sent by another user. This vulnerability is fixed in 0.11.1 and 0.12.0.

Category

4.9
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.02%
Affected: matrix-org matrix-rust-sdk
Published at:
Updated at:

References

Link Tags
https://github.com/matrix-org/matrix-rust-sdk/security/advisories/GHSA-x958-rvg6-956w
https://github.com/matrix-org/matrix-rust-sdk/commit/13c1d2048286bbabf5e7bc6b015aafee98f04d55
https://github.com/matrix-org/matrix-rust-sdk/commit/56980745b4f27f7dc72ac296e6aa003e5d92a75b
https://spec.matrix.org/v1.14/client-server-api/#mmegolmv1aes-sha2

Frequently Asked Questions

What is the severity of CVE-2025-48937?
CVE-2025-48937 has been scored as a medium severity vulnerability.
How to fix CVE-2025-48937?
To fix CVE-2025-48937, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2025-48937 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2025-48937 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-48937?
CVE-2025-48937 affects matrix-org matrix-rust-sdk.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.