Vulnerability Details CVE-2021-40824
A logic error in the room key sharing functionality of Element Android before 1.2.2 and matrix-android-sdk2 (aka Matrix SDK for Android) before 1.2.2 allows a malicious Matrix homeserver present in an encrypted room to steal room encryption keys (via crafted Matrix protocol messages) that were originally sent by affected Matrix clients participating in that room. This allows the attacker to decrypt end-to-end encrypted messages sent by affected clients.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.002
EPSS Ranking 47.1%
CVSS Severity
CVSS v3 Score 5.9
CVSS v2 Score 4.3
References
Products affected by CVE-2021-40824
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cpe:2.3:a:matrix:element:*
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cpe:2.3:a:matrix:matrix-android-sdk2:*