Security Advisory

CVE-2026-57963

CVE vulnerability detail - eXtreme Datacenter Security Operations

Published 2026-07-01 00:58:33

Last updated 2026-07-01 14:09:10

Assigner mozilla

CVSS score not scored

State PUBLISHED

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.

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