CVE-2025-9180

thunderbird: firefox: Same-origin policy bypass in the Graphics: Canvas2D component

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Severity

Important

Red Hat Product Security

7.5

CVSS 3.1

Review impact separately from score.

Published · August 20, 2025

Updated · June 30, 2026

Description

A flaw was found in Thunderbird and Firefox. The Mozilla Foundation's Security Advisory describes the following issue: Same-origin policy bypass in the Graphics: Canvas2D component.

Statement

Red Hat Product Security rates the severity of this flaw as determined by the Mozilla Foundation Security Advisory.

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 · 7.5
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

CWE-200 · Exposure of Sensitive Information to an Unauthorized Actor