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.
Affected products
mozilla: firefox
References2
- www.mozilla.org/security/advisories/mfsa2025-20/ Vendor Advisory
- bugzilla.mozilla.org/show_bug.cgi?id=1952268 Permissions Required
Metrics
- CVSS 3.1
-
5.3
MEDIUM
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N - EPSS — exploit probability
- 0% percentile: 22 · as of 7 November 2026
- CWE
- CWE-359
Could this be exploited in your environment?
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