CVE-2025-1015

Name	CVE-2025-1015
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 affects Thunderbird < 128.7.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
References	DLA-4045-1, DSA-5861-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
thunderbird (PTS)	bullseye	1:115.12.0-1~deb11u1	vulnerable
	bullseye (security)	1:128.7.0esr-1~deb11u1	fixed
	bookworm	1:128.5.0esr-1~deb12u1	vulnerable
	bookworm (security)	1:128.7.0esr-1~deb12u1	fixed
	sid, trixie	1:128.6.0esr-1	vulnerable

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Origin
thunderbird	source	bullseye	1:128.7.0esr-1~deb11u1	DLA-4045-1
thunderbird	source	bookworm	1:128.7.0esr-1~deb12u1	DSA-5861-1
thunderbird	source	(unstable)	(unfixed)

https://www.mozilla.org/en-US/security/advisories/mfsa2025-10/#CVE-2025-1015