Vulnerability Details : CVE-2025-0243
Memory safety bugs present in Firefox 133, Thunderbird 133, Firefox ESR 128.5, and Thunderbird 128.5. 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 affects Firefox < 134, Firefox ESR < 128.6, Thunderbird < 134, and Thunderbird < 128.6.
Vulnerability category: Memory Corruption
Products affected by CVE-2025-0243
- cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*
- cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
- cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*
- cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2025-0243
0.05%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 15 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2025-0243
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
5.1
|
MEDIUM | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N |
2.5
|
2.5
|
134c704f-9b21-4f2e-91b3-4a467353bcc0 | 2025-01-08 |
CWE ids for CVE-2025-0243
-
The product writes data past the end, or before the beginning, of the intended buffer.Assigned by: nvd@nist.gov (Primary)
References for CVE-2025-0243
-
https://www.mozilla.org/security/advisories/mfsa2025-04/
Vendor Advisory
-
https://www.mozilla.org/security/advisories/mfsa2025-02/
Vendor Advisory
-
https://www.mozilla.org/security/advisories/mfsa2025-01/
Vendor Advisory
-
https://www.mozilla.org/security/advisories/mfsa2025-05/
Security Vulnerabilities fixed in Thunderbird ESR 128.6 — MozillaVendor Advisory
-
https://bugzilla.mozilla.org/buglist.cgi?bug_id=1827142%2C1932783
Broken Link;Issue Tracking
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