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CVE-2025-4088: A security vulnerability in Firefox allowed malicious sites to use redirects to send credentialed requests to arbitrary endpoints on any site that...

6.5 CVSS

Description

A security vulnerability in Firefox allowed malicious sites to use redirects to send credentialed requests to arbitrary endpoints on any site that had invoked the Storage Access API. This enabled potential Cross-Site Request Forgery attacks across origins. This vulnerability affects Firefox < 138 and Thunderbird < 138.

Classification

CVE ID: CVE-2025-4088

CVSS Base Severity: MEDIUM

CVSS Base Score: 6.5

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Problem Types

Cross-site request forgery via storage access API redirects

Affected Products

Vendor: Mozilla

Product: Firefox, Thunderbird

Exploit Prediction Scoring System (EPSS)

EPSS Score: 0.02% (probability of being exploited)

EPSS Percentile: 3.28% (scored less or equal to compared to others)

EPSS Date: 2025-05-28 (when was this score calculated)

References

https://nvd.nist.gov/vuln/detail/CVE-2025-4088
https://bugzilla.mozilla.org/show_bug.cgi?id=1953521
https://www.mozilla.org/security/advisories/mfsa2025-28/
https://www.mozilla.org/security/advisories/mfsa2025-31/

Timeline