CVE-2025-0247: Vulnerability in Mozilla Firefox
Memory safety bugs present in Firefox 133 and Thunderbird 133. 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 and Thunderbird 134.
AI Analysis
Technical Summary
This vulnerability consists of memory safety bugs in Firefox 133 and Thunderbird 133, some showing evidence of memory corruption. With sufficient effort, these bugs could have been exploited to run arbitrary code. Mozilla addressed these issues in Firefox 134 and Thunderbird 134. The CVSS 3.1 base score is 9.8, reflecting critical impact on confidentiality, integrity, and availability. The vendor advisories (MFSA 2025-01 and MFSA 2025-04) provide detailed information and confirm the remediation in the respective updated releases.
Potential Impact
Successful exploitation of these memory safety bugs could allow an attacker to execute arbitrary code remotely without any privileges or user interaction, potentially compromising confidentiality, integrity, and availability of the affected systems. However, no known exploits in the wild have been reported at this time.
Mitigation Recommendations
Mozilla has released official fixes for this vulnerability in Firefox 134 and Thunderbird 134. Users and administrators should update to these versions or later to remediate the issue. Patch status is confirmed by the vendor advisories. No additional mitigation actions are required beyond applying the official updates.
CVE-2025-0247: Vulnerability in Mozilla Firefox
Description
Memory safety bugs present in Firefox 133 and Thunderbird 133. 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 and Thunderbird 134.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability consists of memory safety bugs in Firefox 133 and Thunderbird 133, some showing evidence of memory corruption. With sufficient effort, these bugs could have been exploited to run arbitrary code. Mozilla addressed these issues in Firefox 134 and Thunderbird 134. The CVSS 3.1 base score is 9.8, reflecting critical impact on confidentiality, integrity, and availability. The vendor advisories (MFSA 2025-01 and MFSA 2025-04) provide detailed information and confirm the remediation in the respective updated releases.
Potential Impact
Successful exploitation of these memory safety bugs could allow an attacker to execute arbitrary code remotely without any privileges or user interaction, potentially compromising confidentiality, integrity, and availability of the affected systems. However, no known exploits in the wild have been reported at this time.
Mitigation Recommendations
Mozilla has released official fixes for this vulnerability in Firefox 134 and Thunderbird 134. Users and administrators should update to these versions or later to remediate the issue. Patch status is confirmed by the vendor advisories. No additional mitigation actions are required beyond applying the official updates.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2025-01-06T14:49:19.275Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
- Vendor Advisory Urls
- [{"url":"https://www.mozilla.org/security/advisories/mfsa2025-01/","vendor":"Mozilla"},{"url":"https://www.mozilla.org/security/advisories/mfsa2025-04/","vendor":"Mozilla"}]
Threat ID: 69dd057382d89c981f016f8a
Added to database: 4/13/2026, 3:02:11 PM
Last enriched: 4/13/2026, 3:19:36 PM
Last updated: 4/13/2026, 6:17:52 PM
Views: 4
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