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CVE-2020-6828

21
FAUCET Score

CVE-2020-6828 describes a critical vulnerability in Firefox for Android and Firefox ESR for Android, allowing a malicious Android application to overwrite files in a user's profile directory. This could be exploited by supplying a user.js file to set arbitrary malicious preferences, potentially leading to arbitrary code execution. With a CVSS score of 7.5 (High), this vulnerability requires no user interaction and has low attack complexity, posing a significant integrity risk. While no public exploit code (Metasploit, Nuclei, ExploitDB) is available and it's not on CISA's KEV catalog, it has garnered some community discussion and media coverage, indicating awareness within the security community.

Impacted Technologies

VendorProductVersion(s)CPE
< 68.7.0CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:*
< 68.7CPE match
cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.47%
Probability of exploitation in next 30 days
EPSS Percentile
71.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0147 is in the 52nd percentile among its peer group of 51,551 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (1)

mozillavendor investigatingvia nvd_reference
View patch

Vendor Advisories (1)

redhatCVE-2020-6828Important

Mozilla: Preference overwrite via crafted Intent from malicious Android application

Apr 8, 2020

References

bugzilla.mozilla.org / show_bug.cgi
Issue TrackingPermissions Required
mozilla.org / security/advisories/mfsa2020-13
Vendor Advisory