CVE-2025-9181
Uninitialized memory in the JavaScript Engine component
CVSS Score
6.5
EPSS Score
0.1%
EPSS Percentile
19th
Uninitialized memory in the JavaScript Engine component. This vulnerability was fixed in Firefox 142, Firefox ESR 128.14, Firefox ESR 140.2, Thunderbird 142, Thunderbird 128.14, and Thunderbird 140.2.
| Vendor | mozilla |
| Product | firefox |
| Ecosystems | |
| Industries | Technology |
| Published | Aug 19, 2025 |
| Last Updated | Apr 13, 2026 |
Stay Ahead of the Next One
Get instant alerts for mozilla firefox
Be the first to know when new medium vulnerabilities affecting mozilla firefox are published — delivered to Slack, Telegram or Discord.
Get Free Alerts →
Free · No credit card · 60 sec setup
Affected Versions
Mozilla / Firefox
All versions affected Mozilla / Thunderbird
All versions affected References
bugzilla.mozilla.org: https://bugzilla.mozilla.org/show_bug.cgi?id=1977130 mozilla.org: https://www.mozilla.org/security/advisories/mfsa2025-64/ mozilla.org: https://www.mozilla.org/security/advisories/mfsa2025-66/ mozilla.org: https://www.mozilla.org/security/advisories/mfsa2025-67/ mozilla.org: https://www.mozilla.org/security/advisories/mfsa2025-70/ mozilla.org: https://www.mozilla.org/security/advisories/mfsa2025-71/ mozilla.org: https://www.mozilla.org/security/advisories/mfsa2025-72/ lists.debian.org: https://lists.debian.org/debian-lts-announce/2025/08/msg00018.html lists.debian.org: https://lists.debian.org/debian-lts-announce/2025/08/msg00016.html
Credits
Irvan Kurniawan