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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.
Reserved 2025-03-31 | Published 2025-04-01 | Updated 2025-04-02 | Assigner mozillaURL Bar Spoofing via non-BMP Unicode characters
Renwa Hiwa
bugzilla.mozilla.org/show_bug.cgi?id=1952213
www.mozilla.org/security/advisories/mfsa2025-20/
www.mozilla.org/security/advisories/mfsa2025-22/
www.mozilla.org/security/advisories/mfsa2025-23/
www.mozilla.org/security/advisories/mfsa2025-24/
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