CVE-2025-1015

Name: CVE-2025-1015
Creator: NVD / NIST
Published: 2025-02-04T14:15:32.363+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.4/10EPSS 1.28%

Last modified Jun 17, 2026

CVE-2025-1015 is a medium-severity vulnerability rated 5.4/10 on the CVSS scale. The Thunderbird Address Book URI fields contained unsanitized links. This could be used by an attacker to create and export an address book containing a malicious payload in a field. EPSS estimates a 1.28% chance of exploitation in the next 30 days.

Description

The Thunderbird Address Book URI fields contained unsanitized links. This could be used by an attacker to create and export an address book containing a malicious payload in a field. For example, in the “Other” field of the Instant Messaging section. If another user imported the address book, clicking on the link could result in opening a web page inside Thunderbird, and that page could execute (unprivileged) JavaScript. This vulnerability was fixed in Thunderbird 128.7 and Thunderbird 135.

Metrics

CVSS 3.1

5.4/10

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

EPSS Probability

1.28%

66.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Mozilla	Thunderbird	>= 128.0.1, < 128.7.0

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1939458Permissions Required
https://www.mozilla.org/security/advisories/mfsa2025-10/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2025-11/

Timeline

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

Frequently Asked Questions

What is CVE-2025-1015?

How severe is CVE-2025-1015?

CVE-2025-1015 has a CVSS score of 5.4/10 (MEDIUM severity). The EPSS model estimates a 1.28% probability of exploitation in the next 30 days.

How do I fix CVE-2025-1015?

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-2025-1015?

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

Scan your code now

Source: NVD / NIST