CVE-2025-10859
BaseFortify
Publication date: 2025-09-30
Last updated on: 2026-04-13
Assigner: Mozilla Corporation
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| mozilla | firefox | From 60.9.0 (exc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-359 | The product does not properly prevent a person's private, personal information from being accessed by actors who either (1) are not explicitly authorized to access the information or (2) do not have the implicit consent of the person about whom the information is collected. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability involves cookie storage for non-HTML temporary documents in Firefox for iOS. Cookies from private (Incognito) tabs were incorrectly shared with normal browsing sessions, allowing information from private tabs to escape Incognito mode even after all private tabs were closed. This breaks the expected isolation of private browsing. [1]
How can this vulnerability impact me? :
The vulnerability can lead to leakage of private browsing data into normal browsing sessions. This means sensitive information from private tabs could be accessed outside of Incognito mode, potentially exposing your private browsing activity and data to other websites or users of the device. [1]
What immediate steps should I take to mitigate this vulnerability?
Update Firefox for iOS to version 143.1 or later, as this version contains the fix for the vulnerability involving cookie storage in Incognito mode. Avoid using affected versions of Firefox for iOS until the update is applied to prevent private browsing data leakage. [1]