CVE-2020-12404

4.3 mediumEPSS 0.8%

Medium (4.3) in mozilla firefox mobile. EPSS 0.8% chance of exploitation in the next 30 days.

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 could leak when used for downloading files. This vulnerability affects Firefox for iOS < 26.

Severity

CVSS 3.1

4.3 medium

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

EPSS: 0.8% chance of exploitation in the next 30 days; higher than 56% of CVEs (scores of 2026-10-31)
CWE: CWE-79
Published: 2020-07-09
Modified: 2026-08-19
Record from: the NVD, synced 2026-10-19

Affected

mozilla:firefox_mobile

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1631739
https://www.mozilla.org/security/advisories/mfsa2020-19/
https://bugzilla.mozilla.org/show_bug.cgi?id=1631739
https://www.mozilla.org/security/advisories/mfsa2020-19/

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