CVE-2025-4088

Name: CVE-2025-4088
Creator: NVD / NIST
Published: 2025-04-29T14:15:35.45+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 0.15%

Last modified Jun 17, 2026

CVE-2025-4088 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. A security vulnerability in Thunderbird 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. EPSS estimates a 0.15% chance of exploitation in the next 30 days.

Description

A security vulnerability in Thunderbird 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 was fixed in Firefox 138 and Thunderbird 138.

Metrics

CVSS 3.1

6.5/10

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

EPSS Probability

0.15%

4.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-352

Affected Software

Vendor	Product	Versions
Mozilla	Firefox	< 138.0
Mozilla	Thunderbird	< 138.0

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1953521Permissions Required
https://www.mozilla.org/security/advisories/mfsa2025-28/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2025-31/Vendor Advisory

Timeline

Published: Apr 29, 2025
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2025-4088?

How severe is CVE-2025-4088?

CVE-2025-4088 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 0.15% probability of exploitation in the next 30 days.

How do I fix CVE-2025-4088?

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.

Are you affected by CVE-2025-4088?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST