CVE-2025-13019: Same-origin Policy Bypass
Source GCVE Database
Not known to be exploited · CVSS 8.1 High.
Data as of 13 Nov 2026, 18:29 UTC
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 11 Nov 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: 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 13 Nov 2026.
Description
Same-origin policy bypass in the DOM: Workers component. This vulnerability affects Firefox < 145 and Firefox ESR < 140.5.
References
- nvd.nist.gov/vuln/detail/CVE-2025-13019 (opens in a new tab)
- bugzilla.mozilla.org/show_bug.cgi?id=1988412 (opens in a new tab)
- mozilla.org/security/advisories/mfsa2025-87 (opens in a new tab)
- mozilla.org/security/advisories/mfsa2025-88 (opens in a new tab)
- mozilla.org/security/advisories/mfsa2025-90 (opens in a new tab)
- mozilla.org/security/advisories/mfsa2025-91 (opens in a new tab)