CVE-2025-3029

Name	CVE-2025-3029
Description	A crafted URL containing specific Unicode characters could have hidden the true origin of the page, resulting in a potential spoofing attack. This vulnerability affects Firefox < 137, Firefox ESR < 128.9, Thunderbird < 137, and Thunderbird < 128.9.
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-4109-1, DLA-4110-1, DSA-5889-1, DSA-5891-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
firefox (PTS)	sid	137.0.2-1	fixed
firefox-esr (PTS)	bullseye	115.14.0esr-1~deb11u1	vulnerable
	bullseye (security)	128.9.0esr-1~deb11u1	fixed
	bookworm	128.8.0esr-1~deb12u1	vulnerable
	bookworm (security)	128.9.0esr-1~deb12u1	fixed
	sid, trixie	128.9.0esr-2	fixed
thunderbird (PTS)	bullseye	1:115.12.0-1~deb11u1	vulnerable
	bullseye (security)	1:128.9.0esr-1~deb11u1	fixed
	bookworm	1:128.8.0esr-1~deb12u1	vulnerable
	bookworm (security)	1:128.9.0esr-1~deb12u1	fixed
	sid, trixie	1:128.9.0esr-1	fixed

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

Package	Type	Release	Fixed Version	Origin
firefox	source	(unstable)	137.0-1
firefox-esr	source	bullseye	128.9.0esr-1~deb11u1	DLA-4109-1
firefox-esr	source	bookworm	128.9.0esr-1~deb12u1	DSA-5889-1
firefox-esr	source	(unstable)	128.9.0esr-1
thunderbird	source	bullseye	1:128.9.0esr-1~deb11u1	DLA-4110-1
thunderbird	source	bookworm	1:128.9.0esr-1~deb12u1	DSA-5891-1
thunderbird	source	(unstable)	1:128.9.0esr-1

Notes

https://www.mozilla.org/en-US/security/advisories/mfsa2025-20/#CVE-2025-3029
https://www.mozilla.org/en-US/security/advisories/mfsa2025-22/#CVE-2025-3029
https://www.mozilla.org/en-US/security/advisories/mfsa2025-24/#CVE-2025-3029