Information disclosure in Firefox for iOS - CVE-2025-10859
Published: October 1, 2025
Vulnerability identifier: #VU116219
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2025-10859
CWE-ID: CWE-200
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Mozilla
Affected software:
Firefox for iOS
Firefox for iOS
Detailed vulnerability description
The vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists due to cookie storage for non-HTML temporary documents is shared incorrectly with normal browsing content. A remote attacker can trick the victim into visiting a specially crafted website and access information used from the Incognito mode even after the user closed all tabs.
How to mitigate CVE-2025-10859
Install updates from vendor's website.