CVE-2025-4918
critical · 9.8An attacker was able to perform an out-of-bounds read or write on a JavaScript `Promise` object. This vulnerability was fixed in Firefox 138.0.4, Firefox ESR 128.10.1, Firefox ESR 115.23.1, Thunderbird 128.10.2, and Thunderbird 138.0.2.
9.8
CVSS
9.4%
EPSS (exploit prob.)
95th
EPSS percentile
2025-05-17
Published
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weaknesses
CWE-125CWE-787
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| mozilla | firefox | < 115.23.1 |
| mozilla | firefox | < 138.0.4 |
| mozilla | firefox | >= 116.0, < 128.10.1 |
| mozilla | thunderbird | < 128.10.2 |
| mozilla | thunderbird | >= 138.0, < 138.0.2 |
Check a specific version with /api/v1/cve/match.
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=1966612
- https://www.mozilla.org/security/advisories/mfsa2025-36/
- https://www.mozilla.org/security/advisories/mfsa2025-37/
- https://www.mozilla.org/security/advisories/mfsa2025-38/
- https://www.mozilla.org/security/advisories/mfsa2025-40/
- https://www.mozilla.org/security/advisories/mfsa2025-41/
- https://lists.debian.org/debian-lts-announce/2025/05/msg00024.html
- https://lists.debian.org/debian-lts-announce/2025/05/msg00046.html
- https://www.vicarius.io/vsociety/posts/cve-2025-4918-detect-firefox-out-of-bounds-write
- https://www.vicarius.io/vsociety/posts/cve-2025-4918-mitigate-firefox-out-of-bounds-write
Query this programmatically:
curl https://evil-db.io/api/v1/cve/CVE-2025-4918