CVE-2025-3033

Name: CVE-2025-3033
Creator: NVD / NIST
Published: 2025-04-01T13:15:41.697+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.7/10EPSS 0.16%

Last modified Jun 17, 2026

CVE-2025-3033 is a high-severity vulnerability rated 7.7/10 on the CVSS scale. After selecting a malicious Windows `.url` shortcut from the local filesystem, an unexpected file could be uploaded. *This bug only affects Firefox on Windows. EPSS estimates a 0.16% chance of exploitation in the next 30 days.

Description

After selecting a malicious Windows `.url` shortcut from the local filesystem, an unexpected file could be uploaded. *This bug only affects Firefox on Windows. Other operating systems are unaffected.*. This vulnerability was fixed in Firefox 137 and Thunderbird 137.

Metrics

CVSS 3.1

7.7/10

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

EPSS Probability

0.16%

5.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-73

Affected Software

Vendor	Product	Versions
Mozilla	Firefox	< 137.0
Mozilla	Thunderbird	< 137.0

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1950056Issue Tracking, Permissions Required
https://www.mozilla.org/security/advisories/mfsa2025-20/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2025-23/Vendor Advisory

Timeline

Published: Apr 1, 2025
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2025-3033?

How severe is CVE-2025-3033?

CVE-2025-3033 has a CVSS score of 7.7/10 (HIGH severity). The EPSS model estimates a 0.16% probability of exploitation in the next 30 days.

How do I fix CVE-2025-3033?

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-2025-3033?

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

Scan your code now

Source: NVD / NIST