CVE-2025-10534
HIGHCVSS 8.1/10EPSS 0.33%
Last modified
CVE-2025-10534 is a high-severity vulnerability rated 8.1/10 on the CVSS scale. Spoofing issue in the Site Permissions component. This vulnerability was fixed in Firefox 143 and Thunderbird 143.. EPSS estimates a 0.33% chance of exploitation in the next 30 days.
Description
Spoofing issue in the Site Permissions component. This vulnerability was fixed in Firefox 143 and Thunderbird 143.
Metrics
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Mozilla | Firefox | < 143.0 |
| Mozilla | Thunderbird | < 143.0 |
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=1665334Permissions Required
- https://www.mozilla.org/security/advisories/mfsa2025-73/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2025-77/Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2025-10534?
Spoofing issue in the Site Permissions component. This vulnerability was fixed in Firefox 143 and Thunderbird 143.
How severe is CVE-2025-10534?
CVE-2025-10534 has a CVSS score of 8.1/10 (HIGH severity). The EPSS model estimates a 0.33% probability of exploitation in the next 30 days.
How do I fix CVE-2025-10534?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2025
- CVE-2025-10529Same-origin policy bypass in the Layout component. This vuln…6.5
- CVE-2025-1053Under certain error conditions at time of SANnav installatio…4.9
- CVE-2025-10530Spoofing issue in the WebAuthn component in Firefox for Andr…6.5
- CVE-2025-10531Mitigation bypass in the Web Compatibility: Tooling componen…5.4
- CVE-2025-10532Incorrect boundary conditions in the JavaScript: GC componen…6.5
- CVE-2025-10533Integer overflow in the SVG component. This vulnerability wa…8.8
- CVE-2025-10535Information disclosure, mitigation bypass in the Privacy com…7.5
- CVE-2025-10536Information disclosure in the Networking: Cache component. T…6.2
- CVE-2025-10537Memory safety bugs present in Firefox ESR 140.2, Thunderbird…8.8
- CVE-2025-10538An authentication bypass vulnerability exists in LG Innotek …8.8
- CVE-2025-10539Due to improper TLS certificate validation in the DeskTime T…4.8
- CVE-2025-1054The UiCore Elements – Free Elementor widgets and templates p…6.4
Are you affected by CVE-2025-10534?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST