CVE-2025-9180 — Origin Validation Error in Mozilla Firefox

CWE-346 — Origin Validation ErrorCWE-200 — Sensitive Information ExposureCWE-833 — Deadlock16 documents8 sources
Severity
8.1HIGHNVD
EPSS
0.0%
top 91.15%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
2
Mozilla ThunderbirdMozilla Firefox
Timeline
PublishedAug 19
Latest updateFeb 2

Description

Same-origin policy bypass in the Graphics: Canvas2D component. This vulnerability was fixed in Firefox 142, Firefox ESR 115.27, Firefox ESR 128.14, Firefox ESR 140.2, Thunderbird 142, Thunderbird 128.14, and Thunderbird 140.2.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:NExploitability: 2.8 | Impact: 5.2

Affected Packages3 packages

▶NVDmozilla/firefox128.0 — 128.14.0+3
▶NVDmozilla/thunderbird140.0 — 140.2.0+2
▶Debianmozilla/thunderbird< 1:128.14.0esr-1~deb11u1+3

🔴Vulnerability Details

4
OSV
blk-mq: fix potential deadlock while nr_requests grown↗2025-11-12
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OSV
CVE-2025-9180: Same-origin policy bypass in the Graphics: Canvas2D component↗2025-08-19
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GHSA
GHSA-728v-c7pv-wm7x: 'Same-origin policy bypass in the Graphics: Canvas2D component↗2025-08-19
▶
CVEList
Same-origin policy bypass in the Graphics: Canvas2D component↗2025-08-19
▶

📋Vendor Advisories

11
Ubuntu
Thunderbird vulnerabilities↗2026-02-02
▶
Red Hat
kernel: blk-mq: fix potential deadlock while nr_requests grown↗2025-11-12
▶
Red Hat
thunderbird: firefox: Same-origin policy bypass in the Graphics: Canvas2D component↗2025-08-19
▶
Debian
CVE-2025-9180: firefox - Same-origin policy bypass in the Graphics: Canvas2D component. This vulnerabilit...↗2025
▶
Mozilla
Mozilla Foundation Security Advisory 2025-66: CVE-2025-9180↗
▶
CVE-2025-9180 — Origin Validation Error in Mozilla | cvebase