CVE-2025-9180: Mozilla Firefox · Vulnerability
Affects Mozilla FirefoxSource CVE Database V5
Not known to be exploited · CVSS 8.1 High.
Data as of 25 Oct 2026, 19:02 UTC
- EPSS
- 0.2% chance of exploitation in 30 days – higher than 18% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:NExploitation evidence
Disclosed: evidence found.
CVE published 19 Aug 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 2026-10-25.
What to do
AI-suggested
Mozilla has released official fixes for this vulnerability in Firefox 142, Firefox ESR 115.27, Firefox ESR 128.14, Firefox ESR 140.2, Thunderbird 142, Thunderbird 128.14, and Thunderbird 140.2. Users and administrators should upgrade to these versions or later to remediate the vulnerability. Since this is not a cloud service, remediation depends on applying these updates. Patch status is confirmed by Mozilla advisories MFSA 2025-64 and MFSA 2025-65. No additional mitigation steps are indicated by the vendor advisory.
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.
References
- bugzilla.mozilla.org/show_bug.cgi?id=1979782 (opens in a new tab)
- mozilla.org/security/advisories/mfsa2025-64/ (opens in a new tab)
- mozilla.org/security/advisories/mfsa2025-65/ (opens in a new tab)
- mozilla.org/security/advisories/mfsa2025-66/ (opens in a new tab)
- mozilla.org/security/advisories/mfsa2025-67/ (opens in a new tab)
- mozilla.org/security/advisories/mfsa2025-70/ (opens in a new tab)
- mozilla.org/security/advisories/mfsa2025-71/ (opens in a new tab)
- mozilla.org/security/advisories/mfsa2025-72/ (opens in a new tab)
- lists.debian.org/debian-lts-announce/2025/08/msg00018.html (opens in a new tab)
- lists.debian.org/debian-lts-announce/2025/08/msg00016.html (opens in a new tab)