CyberRota Analysis
This is a medium severity vulnerability with a CVSS score of 6.5. See the original NVD description below for full technical details.
CVE
CVE-2026-57963
Severity
MEDIUM
CVSS
6.5
EPSS
0.19%
Original NVD Description
An attacker who can send HTML chat messages (via Matrix or XMPP) can inject arbitrary styled content, phishing links, and CSS that manipulates the chat UI. This vulnerability was fixed in Thunderbird 152.0.1 and Thunderbird 140.12.1.
Related CVEs
Other vulnerabilities affecting the same vendor(s)