Vulnerability identifier: #VU103609
Vulnerability risk: Low
CVSSv4.0: 1.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N/E:U/U:Clear]
CVE-ID:
CWE-ID:
CWE-362
Exploitation vector: Network
Exploit availability: No
Vulnerable software:
Mozilla Firefox
Client/Desktop applications /
Web browsers
Firefox ESR
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 sensitive information.
The vulnerability exists due to a race condition when opening private browsing tabs. A remote attacker can force the browser to open private browsing tabs in normal browsing windows and gain access to sensitive information.
Mitigation
Install updates from vendor's website.
Vulnerable software versions
Mozilla Firefox: 120.0 - 134.0.2
Firefox ESR: 128.0 - 128.6.0
Firefox for Android: 120.0 - 134.0
External links
http://www.mozilla.org/en-US/security/advisories/mfsa2025-09/
http://www.mozilla.org/en-US/security/advisories/mfsa2025-07/
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.