CVE-2025-1013

Name: CVE-2025-1013
Creator: NVD / NIST
Published: 2025-02-04T14:15:32.123+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 0.30%

Last modified Jun 17, 2026

CVE-2025-1013 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. A race condition could have led to private browsing tabs being opened in normal browsing windows. This could have resulted in a potential privacy leak. EPSS estimates a 0.30% chance of exploitation in the next 30 days.

Description

A race condition could have led to private browsing tabs being opened in normal browsing windows. This could have resulted in a potential privacy leak. This vulnerability was fixed in Firefox 135, Firefox ESR 128.7, Thunderbird 128.7, and Thunderbird 135.

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

0.30%

21.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-362

Affected Software

Vendor	Product	Versions
Mozilla	Firefox	< 128.7.0
Mozilla	Firefox	< 135.0
Mozilla	Thunderbird	< 128.7.0
Mozilla	Thunderbird	>= 129.0, < 135.0

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1932555Issue Tracking
https://www.mozilla.org/security/advisories/mfsa2025-07/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2025-09/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2025-10/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2025-11/Vendor Advisory
https://lists.debian.org/debian-lts-announce/2025/02/msg00006.html

Timeline

Published: Feb 4, 2025
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2025-1013?

How severe is CVE-2025-1013?

CVE-2025-1013 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 0.30% probability of exploitation in the next 30 days.

How do I fix CVE-2025-1013?

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-2025-1013?

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

Scan your code now

Source: NVD / NIST