CVE-2025-0243 Details
Description
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 was fixed in Firefox 134, Firefox ESR 128.6, Thunderbird 134, and Thunderbird 128.6.
A vulnerability has been identified in Mozilla Firefox and Thunderbird applications, specifically in versions prior to 134, Firefox ESR through 128.5, and Thunderbird through 128.5. This vulnerability arises from memory safety issues that could lead to memory corruption. While these flaws generally cannot be exploited through email in Thunderbird due to disabled scripting when reading mail, they pose potential risks in browser or browser-like contexts.
Users can upgrade to Firefox 134, Thunderbird 134, Firefox ESR 128.6, or Thunderbird 128.6 to address this vulnerability.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Jan 8, 2025References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://lists.debian.org/debian-lts-announce/2025/01/msg00004.html | CVE | |
| https://bugzilla.mozilla.org/buglist.cgi?bug_id=1827142%2C1932783 | [email protected] | Broken LinkIssue Tracking |
| https://www.mozilla.org/security/advisories/mfsa2025-01/ | [email protected] | Vendor Advisory |
| https://www.mozilla.org/security/advisories/mfsa2025-02/ | [email protected] | Vendor Advisory |
| https://www.mozilla.org/security/advisories/mfsa2025-04/ | [email protected] | Vendor Advisory |
| https://www.mozilla.org/security/advisories/mfsa2025-05/ | [email protected] | Vendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-787 | Out-of-bounds Write | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| mozilla firefox | < 128.6.0 < 133.0 |
CPE
Remediation
| |
| mozilla thunderbird | < 128.6.0 >= 129.0, < 134.0 |
CPE
Remediation
| |
Change History
9 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Apr 13, 2026 | CVE Modified | [email protected] |
| Nov 3, 2025 | CVE Modified | CVE |
| Apr 3, 2025 | Initial Analysis | [email protected] |
| Jan 13, 2025 | CVE Modified | [email protected] |
| Jan 9, 2025 | CVE Modified | [email protected] |
| Jan 8, 2025 | CVE Modified | CISA-ADP |
| Jan 7, 2025 | New CVE Received | [email protected] |