CVE-2025-10859

MEDIUM EPSS 1.6%
Published Sep 30, 20259mo ago · Modified Jun 17, 20262w ago
4.0 CVSS 3.1
Medium
Find Similar
Published Sep 30, 2025 9mo ago
Last Modified Jun 17, 2026 2w ago

Description

Cookie storage for non-HTML temporary documents was being shared incorrectly with normal browsing content, allowing information from private tabs to escape Incognito mode even after the user closed all tabs. This vulnerability was fixed in Firefox for iOS 143.1.

CVSS Details

Base Score
4.0
Exploitability
2.5
Impact
1.4
Vector string
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Attack Vector Local
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality Low
Integrity None
Availability None

Threat Intelligence

EPSS Exploit Probability
1.6% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 1

CWE-359

Affected Products 1

VendorProductVersionRange
mozillafirefox* <143.1.0

References 2

  • bugzilla.mozilla.org https://bugzilla.mozilla.org/show_bug.cgi?id=1684624
    Issue TrackingPermissions Required
  • mozilla.org https://www.mozilla.org/security/advisories/mfsa2025-79/
    Vendor Advisory

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.