CVE-2025-3035

Tab title disclosure across pages when using AI chatbot

State: Published
Severity: 5.3 Medium
Published: Apr 1, 2025
Updated: Apr 13, 2026
Reserved: Mar 31, 2025

Description

By first using the AI chatbot in one tab and later activating it in another tab, the document title of the previous tab would leak into the chat prompt. This vulnerability was fixed in Firefox 137.

Scores

CVSS	Score	Vector	Source
3.1	5.3 Medium	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N	CISA-ADP

Weaknesses

CWE-359 Exposure of Private Personal Information to an Unauthorized Actor

Affected Products

Product	Versions
FirefoxMozilla	137 and laterNot affected

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1952268
https://www.mozilla.org/security/advisories/mfsa2025-20/

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