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Fencer Intel
high 7.5

CVE-2020-6828 json

A malicious Android application could craft an Intent that would have been processed by Firefox for Android and potentially result in a fil…

published 6y ago modified 4mo ago also EUVD-2020-27972

cvss
7.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.5%
EPSS 1.5% chance of exploitation in 30 days, percentile 74%
public exploits
0
none known

Summary

A malicious Android application could craft an Intent that would have been processed by Firefox for Android and potentially result in a file overwrite in the user's profile directory. One exploitation vector for this would be to supply a user.js file providing arbitrary malicious preference values. Control of arbitrary preferences can lead to sufficient compromise such that it is generally equivalent to arbitrary code execution.<br> *Note: This issue only affects Firefox for Android. Other operating systems are unaffected.*. This vulnerability affects Firefox ESR < 68.7.

Patch / fix

  • Mozilla Firefox ESR 68.7
  • MozillaFirefox SLES for SAP 12 SP5, SLES for SAP 12 SP4, SLES for SAP 12 SP3 +16 more 68.7.0-109.116.1
  • MozillaFirefox SLE Module for Desktop Applications 15 SP1 68.7.0-3.84.2
  • MozillaFirefox SLES 11 SP4-LTSS 68.7.0-78.70.1

suse advisories SUSE-SU-2020:0978-1SUSE-SU-2020:14339-1SUSE-SU-2020:0971-1

  • MozillaFirefox openSUSE Leap 15.1 68.7.0-lp151.2.42.1

opensuse advisories openSUSE-SU-2020:0493-1

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2020-6828 updated cvss 7.5

Mozilla: Preference overwrite via crafted Intent from malicious Android application

  • Red Hat Enterprise Linux 5 firefox Red Hat Enterprise Linux 6 firefox Red Hat Enterprise Linux 7 firefox Red Hat Enterprise Linux 8 firefox
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

1.51% chance of exploitation in the next 30 days, higher than 74% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
NVD 2.0 6.4 AV:N/AC:L/Au:N/C:N/I:P/A:P

Affected products

  • Mozilla Firefox ESR

Classification

Weakness
  • CWE-22 Improper Limitation of a Pathname to a Restricted Directory

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.