CVE-2025-1015

Unsanitized address book fields

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 affects Thunderbird < 128.7 and Thunderbird < 135.

Affected

Mozilla · Thunderbird

CVSS v3.1 NVD

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

EPSS

1.37% chance of exploitation in the next 30 days, 72nd percentile

Published

2025-02-04

Updated

2026-04-13

Proof-of-concept exploits (1)

• r3m0t3nu11/CVE-2025-10153★ · 2025-02-08

Security advisories

• https://www.mozilla.org/security/advisories/mfsa2025-10

References

• CVE Record
• NVD entry

Related

• CVE-2019-1759