User Impersonation Affecting matrix-sdk-crypto package, versions >=0.8.0 <0.11.1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published20 Jun 2025
- disclosed10 Jun 2025
- creditDenis Kasak
Introduced: 10 Jun 2025
CVE-2025-48937 (opens in a new tab)How to fix?
Upgrade matrix-sdk-crypto to version 0.11.1 or higher.
Overview
Affected versions of this package are vulnerable to User Impersonation due to improper validation of the sender identity in encrypted events. An attacker can manipulate events to appear as if they were sent by another user by exploiting the administrative privileges on the homeserver.
Note:
This is only exploitable if the attacker has administrative access to the homeserver.