CVE-2025-8029
High
Published: 22 July 2025
Published
22 July 2025
Modified
13 April 2026
KEV Added
—
Patch
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CVSS Score v3.1
8.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
EPSS Score
0.0028
51.4th percentile
Risk Priority
16
60% EPSS · 20% KEV · 20% CVSS
Summary
CVE-2025-8029 is a high-severity Basic XSS (CWE-80) vulnerability in Mozilla Firefox. Its CVSS base score is 8.1 (High).
Operationally, ranked in the top 48.6% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2025-22370
Vulnerability details
Thunderbird executed `javascript:` URLs when used in `object` and `embed` tags. This vulnerability was fixed in Firefox 141, Firefox ESR 128.13, Firefox ESR 140.1, Thunderbird 141, Thunderbird 128.13, and Thunderbird 140.1.
- CWE(s)
Related Threats
No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.
Affected Assets
mozilla
firefox
≤ 128.13.0 · ≤ 141.0 · 140.0 — 140.1.0
mozilla
thunderbird
≤ 128.13.0 · ≤ 141.0 · 140.0 — 140.1.0
Mitigating Controls
No mitigating controls mapped yet. The per-CVE control annotator has not reached this CVE.