VulnerabilityModified
CVE-2020-6830
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.
HIGH 7.5EPSS 0.90%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.90%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- EPSS
- 0.90% probability · 58th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-200
- Affected
- mozilla/firefox mobile
- Source
- security@mozilla.org
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=1632387Permissions Required
- https://www.mozilla.org/security/advisories/mfsa2020-15/Vendor Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1632387Permissions Required
- https://www.mozilla.org/security/advisories/mfsa2020-15/Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.