#VU106363 Information disclosure in Mozilla Firefox and Firefox for Android - CVE-2025-3035

Vulnerability identifier: #VU106363

Vulnerability risk: Low

CVSSv4.0: 0.5 [CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2025-3035

CWE-ID: CWE-200

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Mozilla Firefox
Client/Desktop applications / Web browsers
Firefox for Android
Mobile applications / Apps for mobile phones

Vendor: Mozilla

Description

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to the tab title can be leaked when using the AI chatbot in one tab and later activating it in another tab. A remote attacker can gain access to title of a previous tab.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Mozilla Firefox: 130.0 - 136.0.4

Firefox for Android: 130.0 - 136.0.1

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

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.