Read the docs
TI-2020-14065 Aliases CVE-2020-21487GHSA-rff5-9cw2-46c6

Cross Site Scripting vulnerability found in Netgate pfSense 2.4.4 and ACME package…

Priority MEDIUM 44CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Cross-site scripting
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-79.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00666 52nd percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:netgate:pfsense:2.4.4:-:*:*:*:*:*:*2.4.4VulnerableNetgate
cpe:2.3:a:netgate:pfsense_acme_package:0.6.3:*:*:*:*:*:*:*0.6.3VulnerableNetgate
  • cpe:2.3:a:netgate:pfsense:2.4.4:-:*:*:*:*:*:* Versions 2.4.4 Vulnerable ·Netgate
  • cpe:2.3:a:netgate:pfsense_acme_package:0.6.3:*:*:*:*:*:*:* Versions 0.6.3 Vulnerable ·Netgate

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2020-21487
  2. 2026-10-03 Alias added: GHSA-rff5-9cw2-46c6

References

Patch 2

  • TI-2023-12003 A command injection vulnerability in the function restore_rrddata() of Netgate pfSense… CVSS 3.1HIGH 8.8
  • TI-2024-31010 A cross-site scripting (XSS) vulnerability in pfsense v2.5.2 allows attackers to execute… CVSS 3.1CRITICAL 9.3
  • TI-2023-26046 An issue in Netgate pfSense Plus v.23.05.1 and before and pfSense CE v.2.7.0 allows a… CVSS 3.1HIGH 8.8
  • TI-2023-22567 An issue in Netgate pfSense v.2.7.0 allows a remote attacker to execute arbitrary code… CVSS 3.1HIGH 8.8
  • TI-2019-12464 diag_command.php in pfSense 2.4.4-p3 allows CSRF via the txtCommand or txtRecallBuffer… CVSS 3.1HIGH 8.8
  • TI-2018-02989 OS command injection in Netgate pfSense CVSS 3.1HIGH 7.2
See all 48 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences