CVE-2021-40824 describes a logic error in the room key sharing functionality of Element Android and matrix-android-sdk2 versions prior to 1.2.2. This flaw allows a malicious Matrix homeserver within an encrypted room to steal encryption keys from affected clients, enabling the decryption of end-to-end encrypted messages. Rated Medium (CVSS 5.9), the vulnerability requires high attack complexity but can lead to a complete compromise of confidentiality without user interaction. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 1.2.2CPE matchmatch criteria | cpe:2.3:a:matrix:element:*:*:*:*:*:android:*:* | ||
< 1.2.2CPE matchmatch criteria | cpe:2.3:a:matrix:matrix-android-sdk2:*:*:*:*:*:android:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
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