What is CVE-2020-21487?

CVE-2020-21487 is a critical-severity vulnerability in Netgate Pfsense, classified under Cross-site Scripting. CVSS score: 9.6/10. Published 2023-04-04.

How severe is CVE-2020-21487?

Critical severity. CVSS v3 base score is 9.6 out of 10.

XSS in Netgate Pfsense

CVE-2020-21487

Cross Site Scripting vulnerability found in Netgate pfSense 2.4.4 and ACME package v.0.6.3 allows attackers to execute arbitrary code via the RootFolder field of acme_certificates.php.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.007 (48.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.6 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H.

Affected products

Netgate Pfsense — versions 2.4.4
Netgate Pfsense_acme_package — versions 0.6.3
N/a — versions n/a

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

cve@mitre.org (Patch)
cve@mitre.org (Patch, Issue Tracking)

Frequently asked questions

What is CVE-2020-21487?: CVE-2020-21487 is a critical-severity vulnerability in Netgate Pfsense, classified under Cross-site Scripting. CVSS score: 9.6/10. Published 2023-04-04.
How severe is CVE-2020-21487?: Critical severity. CVSS v3 base score is 9.6 out of 10.