CVE-2022-39250
Mozilla: Matrix SDK bundled with Thunderbird vulnerable to a device verification attack
Severity
ImportantRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · September 28, 2022
Updated · June 26, 2026
Description
A flaw was found in Mozilla. According to the Mozilla Foundation Security Advisory, Thunderbird users who use the Matrix chat protocol are vulnerable to an impersonation attack. A malicious server administrator could interfere with cross-device verification to authenticate their own device.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
CWE-347 · Improper Verification of Cryptographic Signature