CVE-2025-54143
CRITICALCVSS 9.8/10EPSS 0.45%
Last modified
CVE-2025-54143 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. Sandboxed iframes on webpages could potentially allow downloads to the device, bypassing the expected sandbox restrictions declared on the parent page. This vulnerability was fixed in Firefox for iOS 141.. EPSS estimates a 0.45% chance of exploitation in the next 30 days.
Description
Sandboxed iframes on webpages could potentially allow downloads to the device, bypassing the expected sandbox restrictions declared on the parent page. This vulnerability was fixed in Firefox for iOS 141.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Mozilla | Firefox | < 141.0 |
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=1912671Issue Tracking, Permissions Required
- https://www.mozilla.org/security/advisories/mfsa2025-60/Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2025-54143?
Sandboxed iframes on webpages could potentially allow downloads to the device, bypassing the expected sandbox restrictions declared on the parent page. This vulnerability was fixed in Firefox for iOS 141.
How severe is CVE-2025-54143?
CVE-2025-54143 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 0.45% probability of exploitation in the next 30 days.
How do I fix CVE-2025-54143?
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-2025-54137HAX CMS NodeJS allows users to manage their microsite univer…7.3
- CVE-2025-54138LibreNMS is an auto-discovering PHP/MySQL/SNMP based network…7.5
- CVE-2025-54139HAX CMS allows users to manage their microsite universe with…6.1
- CVE-2025-54140pyLoad is a free and open-source Download Manager written in…7.5
- CVE-2025-54141ViewVC is a browser interface for CVS and Subversion version…7.5
- CVE-2025-54142Akamai Ghost before 2025-07-21 allows HTTP Request Smuggling…4
- CVE-2025-54144The URL scheme used by Firefox to facilitate searching of te…5.4
- CVE-2025-54145The QR scanner could allow arbitrary websites to be opened i…9.1
- CVE-2025-54146A NULL pointer dereference vulnerability has been reported t…6.5
- CVE-2025-54147A NULL pointer dereference vulnerability has been reported t…6.5
- CVE-2025-54148A NULL pointer dereference vulnerability has been reported t…6.5
- CVE-2025-54149An uncontrolled resource consumption vulnerability has been …5.5
Are you affected by CVE-2025-54143?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST