CVE-2025-8039: Vulnerability in Mozilla Firefox
In some cases search terms persisted in the URL bar even after navigating away from the search page. This vulnerability was fixed in Firefox 141, Firefox ESR 140.1, Thunderbird 141, and Thunderbird 140.1.
AI Analysis
Technical Summary
The vulnerability CVE-2025-8039 in Mozilla Firefox involves search terms remaining visible in the URL bar after the user navigates away from the search page. This could potentially expose sensitive search information unintentionally. The issue was addressed and fixed in Firefox 141 and Firefox ESR 140.1. It is part of a set of security fixes released by Mozilla on July 22, 2025. The CVSS score for this vulnerability is 8.1, indicating a high severity overall, but the vendor advisory classifies the impact of this specific issue as low. The vulnerability is related to information disclosure (CWE-200).
Potential Impact
The vulnerability may lead to unintended disclosure of search terms in the URL bar, potentially exposing user search data to observers or through screenshots. However, the vendor advisory classifies the impact as low, indicating limited risk compared to other vulnerabilities fixed in the same release.
Mitigation Recommendations
This vulnerability has been fixed in Firefox 141 and Firefox ESR 140.1. Users and administrators should update affected Firefox installations to version 141 or later to remediate this issue. No additional mitigation actions are required beyond applying the official update.
CVE-2025-8039: Vulnerability in Mozilla Firefox
Description
In some cases search terms persisted in the URL bar even after navigating away from the search page. This vulnerability was fixed in Firefox 141, Firefox ESR 140.1, Thunderbird 141, and Thunderbird 140.1.
CVSS v3.1
Score 8.1high
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability CVE-2025-8039 in Mozilla Firefox involves search terms remaining visible in the URL bar after the user navigates away from the search page. This could potentially expose sensitive search information unintentionally. The issue was addressed and fixed in Firefox 141 and Firefox ESR 140.1. It is part of a set of security fixes released by Mozilla on July 22, 2025. The CVSS score for this vulnerability is 8.1, indicating a high severity overall, but the vendor advisory classifies the impact of this specific issue as low. The vulnerability is related to information disclosure (CWE-200).
Potential Impact
The vulnerability may lead to unintended disclosure of search terms in the URL bar, potentially exposing user search data to observers or through screenshots. However, the vendor advisory classifies the impact as low, indicating limited risk compared to other vulnerabilities fixed in the same release.
Mitigation Recommendations
This vulnerability has been fixed in Firefox 141 and Firefox ESR 140.1. Users and administrators should update affected Firefox installations to version 141 or later to remediate this issue. No additional mitigation actions are required beyond applying the official update.
Technical Details
- Data Version
- 5.1
- Assigner Short Name
- mozilla
- Date Reserved
- 2025-07-22T10:14:08.352Z
- State
- PUBLISHED
- Vendor Advisory Urls
- [{"url":"https://www.mozilla.org/security/advisories/mfsa2025-56/","vendor":"Mozilla"},{"url":"https://www.mozilla.org/security/advisories/mfsa2025-59/","vendor":"Mozilla"},{"url":"https://www.mozilla.org/security/advisories/mfsa2025-61/","vendor":"Mozilla"},{"url":"https://www.mozilla.org/security/advisories/mfsa2025-63/","vendor":"Mozilla"}]
Threat ID: 687ffd51a915ff00f7fb59c6
Added to database: 07/22/2025, 21:06:25 UTC
Last enriched: 07/29/2026, 21:23:33 UTC
Last updated: 09/10/2026, 19:36:52 UTC
Views: 213
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