CVE-2020-6830 Information

Description

For native-to-JS bridging the app requires a unique token to be passed that ensures non-app code can’t call the bridging functions. That token was being used for JS-to-native also but it isn’t needed in this case and its usage was also leaking this token. This vulnerability affects Firefox for iOS 25.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Reference

https://bugzilla.mozilla.org/show_bug.cgi?id=1632387 https://www.mozilla.org/security/advisories/mfsa2020-15/

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

NONE

Base Score

NONE

Base Severity

7.5