CVE-2025-1014: Vulnerability in Mozilla Firefox
Certificate length was not properly checked when added to a certificate store. In practice only trusted data was processed. This vulnerability was fixed in Firefox 135, Firefox ESR 128.7, Thunderbird 128.7, and Thunderbird 135.
AI Analysis
Technical Summary
The vulnerability identified as CVE-2025-1014 involves improper validation of certificate length when certificates are added to the certificate store in Mozilla Firefox and Thunderbird. Although the certificate length check was insufficient, the vulnerability's practical impact is limited because only trusted data was processed. This issue was addressed and fixed in Firefox 135, Firefox ESR 128.7, Thunderbird 128.7, and Thunderbird 135 as part of Mozilla's February 2025 security updates.
Potential Impact
The impact of CVE-2025-1014 is considered low because the vulnerability involves improper certificate length validation but only affects trusted data, reducing the risk of exploitation. There are no reports of active exploitation in the wild. The vulnerability could potentially affect certificate handling integrity but does not appear to lead to direct compromise or code execution.
Mitigation Recommendations
This vulnerability has been fixed in Firefox 135, Firefox ESR 128.7, Thunderbird 128.7, and Thunderbird 135. Users and administrators should update to these versions or later to ensure protection. Since the vendor advisory confirms the fix, no additional mitigation steps are required beyond applying the official updates.
CVE-2025-1014: Vulnerability in Mozilla Firefox
Description
Certificate length was not properly checked when added to a certificate store. In practice only trusted data was processed. This vulnerability was fixed in Firefox 135, Firefox ESR 128.7, Thunderbird 128.7, and Thunderbird 135.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability identified as CVE-2025-1014 involves improper validation of certificate length when certificates are added to the certificate store in Mozilla Firefox and Thunderbird. Although the certificate length check was insufficient, the vulnerability's practical impact is limited because only trusted data was processed. This issue was addressed and fixed in Firefox 135, Firefox ESR 128.7, Thunderbird 128.7, and Thunderbird 135 as part of Mozilla's February 2025 security updates.
Potential Impact
The impact of CVE-2025-1014 is considered low because the vulnerability involves improper certificate length validation but only affects trusted data, reducing the risk of exploitation. There are no reports of active exploitation in the wild. The vulnerability could potentially affect certificate handling integrity but does not appear to lead to direct compromise or code execution.
Mitigation Recommendations
This vulnerability has been fixed in Firefox 135, Firefox ESR 128.7, Thunderbird 128.7, and Thunderbird 135. Users and administrators should update to these versions or later to ensure protection. Since the vendor advisory confirms the fix, no additional mitigation steps are required beyond applying the official updates.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2025-02-04T07:26:37.144Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 69091a49c28fd46ded81d016
Added to database: 11/3/2025, 9:10:33 PM
Last enriched: 4/14/2026, 11:41:53 AM
Last updated: 5/13/2026, 11:16:45 AM
Views: 82
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.