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CVE-2020-6830

HIGH
7.5
CVSS Score
Published: May 26, 2020 at 05:06 PM UTC
Updated: August 19, 2026 at 03:30 PM UTC
2 products affected across 1 vendorFirefox MobileFirefox

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Severity
HIGH7.5
Exploit prediction
EPSS 0.9%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Firefox Mobile· Mozilla
95%
v < 25.0
Affected range stops below 25.0, so it looks safe — our inference, not a vendor statement
Firefox· Mozilla
60%
v < 25
Affected range stops below 25, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (2)

x_refsource_MISCPermissions Required
Source: [email protected]
https://bugzilla.mozilla.org/show_bug.cgi?id=1632387
x_refsource_MISCVendor Advisory
Source: [email protected]
https://www.mozilla.org/security/advisories/mfsa2020-15/

CVSS

7.5HIGH[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-200

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