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CVE-2020-21219

22
FAUCET Score

CVE-2020-21219 describes a Cross-Site Scripting (XSS) vulnerability in Netgate pfSense 2.4.4-Release-p3 and the Netgate ACME package 0.6.3. This flaw allows remote attackers to execute arbitrary code by injecting malicious scripts into the RootFolder field on the acme_certificate_edit.php page. Rated as Medium severity (CVSS 6.1), it requires user interaction but can lead to low impact on confidentiality and integrity. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
0.6.3CPE matchmatch criteria
cpe:2.3:a:netgate:acme:0.6.3:*:*:*:*:*:*:*
2.4.4CPE matchmatch criteria
cpe:2.3:a:netgate:pfsense:2.4.4:p3:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.1MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
2.7
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.60%
Probability of exploitation in next 30 days
EPSS Percentile
45.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0060 is in the 48th percentile among its peer group of 26,234 CVEs.

Social Chatter

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

Media Mentions

No media coverage found for this CVE.

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

Remediation

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference
View patch

References

github.com / pfsense/FreeBSD-ports/commit/a6f443cde51e7fcf17e51f16014d3589253284d8
PatchThird Party Advisory
redmine.pfsense.org / issues/9888
Third Party Advisory