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CVE-2020-6815

24
FAUCET Score

CVE-2020-6815 is a critical memory and script safety vulnerability affecting Mozilla Firefox versions prior to 74. It could lead to memory corruption or privilege escalation, potentially allowing arbitrary code execution. With a CVSS score of 9.8, this vulnerability is easily exploitable over the network with low attack complexity and no user interaction, resulting in high impacts to confidentiality, integrity, and availability. While no public exploit code or active exploitation has been observed, the vulnerability received notable community discussion and media coverage at the time of its disclosure.

Impacted Technologies

VendorProductVersion(s)CPE
< 74.0CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
< 74CPE match
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.33%
Probability of exploitation in next 30 days
EPSS Percentile
68.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0133 is in the 55th percentile among its peer group of 36,897 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.3 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-2020-6815Important

Mozilla: Memory and script safety bugs fixed in Firefox 74

Mar 10, 2020

References

bugzilla.mozilla.org / buglist.cgi
Permissions RequiredVendor Advisory
mozilla.org / security/advisories/mfsa2020-08
Vendor Advisory