CVE-2026-65638

Published Sep 10, 2026 CVSS 4.0 · 9.2 Critical EPSS 2.3% KEV · Not listed
Description
Improper escaping of a request URL in ConfigServer Security & Firewall allows an unauthenticated remote attacker to execute arbitrary commands as the CSF service account via shell command injection.

The vulnerability affects versions of the software originally distributed by ConfigServer, as well as versions of the WebPros-maintained fork that contain the vulnerable code. WebPros has addressed the vulnerability in version 16.30. Other forks or independently maintained versions of ConfigServer Security & Firewall (CSF) may also be affected and should be evaluated independently.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Configserver
Configserver configserver Security Firewall
Vendors & Products Configserver
Configserver configserver Security Firewall
Type Values Removed Values Added
Title Command Injection via Improper URL Escaping in ConfigServer Security & Firewall
Type Values Removed Values Added
Title Command Injection via Improper URL Escaping in ConfigServer Security & Firewall
Type Values Removed Values Added
Title Unauthenticated Remote Command Execution via CSF Web Interface
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Title Unauthenticated Remote Command Execution via CSF Web Interface
Type Values Removed Values Added
Description Improper escaping of a request URL in ConfigServer Security & Firewall allows an unauthenticated remote attacker to execute arbitrary commands as the CSF service account via shell command injection. The vulnerability affects versions of the software originally distributed by ConfigServer, as well as versions of the WebPros-maintained fork that contain the vulnerable code. WebPros has addressed the vulnerability in version 16.30. Other forks or independently maintained versions of ConfigServer Security & Firewall (CSF) may also be affected and should be evaluated independently.
Weaknesses CWE-78
References
Metrics cvssV4_0

{'score': 9.2, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
hackerone
Published
Updated
Sep 10, 2026, 6:19 PM
Reserved
Jul 22, 2026, 3:00 PM
Status
Awaiting Analysis
Published
Sep 10, 2026, 5:17 PM
Modified
Sep 10, 2026, 7:54 PM