Mozilla: >> Firefox >> 18.0 Security Vulnerabilities
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 Score
4.0
EPSS Score
0.0
Published
2025-09-30
Sandbox escape due to integer overflow in the Graphics: Canvas2D component. This vulnerability was fixed in Firefox 143.0.3.
CVSS Score
8.6
EPSS Score
0.001
Published
2025-09-30
JIT miscompilation in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 143.0.3.
CVSS Score
7.5
EPSS Score
0.0
Published
2025-09-30
Spoofing issue in the Site Permissions component. This vulnerability was fixed in Firefox 143 and Thunderbird 143.
CVSS Score
8.1
EPSS Score
0.0
Published
2025-09-16
Information disclosure, mitigation bypass in the Privacy component in Firefox for Android. This vulnerability was fixed in Firefox 143.
CVSS Score
7.5
EPSS Score
0.0
Published
2025-09-16
Spoofing issue in the WebAuthn component in Firefox for Android. This vulnerability was fixed in Firefox 143 and Thunderbird 143.
CVSS Score
6.5
EPSS Score
0.0
Published
2025-09-16
Mitigation bypass in the Web Compatibility: Tooling component. This vulnerability was fixed in Firefox 143 and Thunderbird 143.
CVSS Score
5.4
EPSS Score
0.0
Published
2025-09-16
Malicious scripts could bypass the popup blocker to spam new tabs, potentially resulting in denial of service attacks. This vulnerability was fixed in Firefox for iOS 142.
CVSS Score
7.5
EPSS Score
0.001
Published
2025-08-19
Firefox for iOS would not respect a Content-Disposition header of type Attachment and would incorrectly display the content inline rather than downloading, potentially allowing for XSS attacks. This vulnerability was fixed in Firefox for iOS 142.
CVSS Score
6.1
EPSS Score
0.0
Published
2025-08-19
Malicious pages could use Firefox for iOS to pass FIDO: links to the OS and trigger the hybrid passkey transport. An attacker within Bluetooth range could have used this to trick the user into using their passkey to log the attacker's computer into the target account. This vulnerability was fixed in Firefox for iOS 142 and Focus for iOS 142.
CVSS Score
9.8
EPSS Score
0.001
Published
2025-08-19