CVE-2020-21487

9.6 criticalEPSS 0.7%

Critical (9.6) in netgate. EPSS 0.7% chance of exploitation in the next 30 days.

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.

Severity

CVSS 3.1

9.6 critical

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

EPSS: 0.7% chance of exploitation in the next 30 days; higher than 51% of CVEs (scores of 2026-10-31)
CWE: CWE-79
Published: 2023-04-04
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

netgate:pfsense
netgate:pfsense_acme_package

References

https://github.com/pfsense/FreeBSD-ports/commit/a6f443cde51e7fcf17e51f16014d3589253284d8
https://redmine.pfsense.org/issues/9888
https://github.com/pfsense/FreeBSD-ports/commit/a6f443cde51e7fcf17e51f16014d3589253284d8
https://redmine.pfsense.org/issues/9888

Check your stack JSON