VDB
CVE-2025-14333
CVE-2025-14333
PUBLISHED
CVSS 8.1 HIGH
Reported by mozilla · Published December 9, 2025
Memory safety bugs present in Firefox ESR 140.5, Thunderbird ESR 140.5, Firefox 145 and Thunderbird 145. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 146, Firefox ESR 140.6, Thunderbird 146, and Thunderbird 140.6.
Fixed versions
Upgrade to a fixed version or later. Language registries are listed first, then Linux distributions, then vendor products.
| Package | Ecosystem | Fixed in |
|---|---|---|
| firefox | Chainguard | 140.6-r0 |
| firefox | Wolfi | 140.6-r0 |
| firefox | Amazon Linux | 140.6.0-1.amzn2023.0.1 |
| thunderbird | Amazon Linux | 140.6.0-1.amzn2.0.1 |
| firefox-esr | Chainguard | 140.6-r0 |
| firefox | mozilla | 146.0, 140.6.0 |
| Firefox ESR | Mozilla | 140.6 |
| thunderbird | mozilla | 146.0, 140.6.0 |
Risk scores
CVSS 3.1
8.1
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected products
| Vendor | Product | Versions |
|---|---|---|
| Mozilla | Firefox | 140.6, 146 |
| Mozilla | Thunderbird | 140.6, 146 |
| Mozilla | Firefox | 140.6, 146 |
| Mozilla | Firefox ESR | unspecified |
| chainguard | firefox | 0 |
| wolfi | firefox | 0 |
| amazon:2023 | firefox | 0 |
| Mozilla | Thunderbird | 140.6, 146 |
| amazon:2 | thunderbird | 0 |
| chainguard | firefox-esr | 0 |
Timeline
- Dec 9, 2025 CVE Published
- Dec 9, 2025 PoC Published (5 in total, the first dated here)
- Dec 10, 2025 EPSS Score (30 in total, the first dated here)
- Apr 30, 2026 Security Advisory (45 in total, the first dated here)
- Jun 22, 2026 Coalition ESS Score
- Oct 10, 2026 Distribution Patch (38 in total, the first dated here)
Query this with the API
The same record, from the CLI:
vulnetix vdb vuln CVE-2025-14333
vulnetix vdb fixes CVE-2025-14333Or with curl, using the org id and key from your account page:
curl -s -H "Authorization: ApiKey ${VULNETIX_ORG_ID}:${VULNETIX_API_KEY}" \
"https://api.vdb.vulnetix.com/v2/vuln/CVE-2025-14333/fixes/registry"The Community plan is free and allows 50 queries a day. Get a free API key · API quickstart