CVE-2026-65638: CWE-78 OS Command Injection in WebPros ConfigServer Security & Firewall
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.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-65638) involves improper escaping of a request URL in ConfigServer Security & Firewall, enabling unauthenticated remote attackers to perform OS command injection. Exploitation allows arbitrary command execution with the privileges of the CSF service account. The issue affects version 14.00 of the original ConfigServer distribution and WebPros forks containing the vulnerable code. WebPros addressed the vulnerability in version 16.30. No known exploits in the wild have been reported.
Potential Impact
Successful exploitation results in remote, unauthenticated attackers executing arbitrary OS commands as the CSF service account, potentially leading to full compromise of the affected system depending on the privileges of that account. The vulnerability has a CVSS 4.0 score of 9.2, indicating critical severity with high impact on confidentiality, integrity, and availability.
Mitigation Recommendations
WebPros has released an official fix in version 16.30 of ConfigServer Security & Firewall. Users should upgrade to version 16.30 or later to remediate this vulnerability. Other forks or independently maintained versions should be evaluated and patched accordingly if vulnerable. No other mitigation or temporary workaround is indicated.
CVE-2026-65638: CWE-78 OS Command Injection in WebPros ConfigServer Security & Firewall
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.
CVSS v4.0
Score 9.2critical
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-65638) involves improper escaping of a request URL in ConfigServer Security & Firewall, enabling unauthenticated remote attackers to perform OS command injection. Exploitation allows arbitrary command execution with the privileges of the CSF service account. The issue affects version 14.00 of the original ConfigServer distribution and WebPros forks containing the vulnerable code. WebPros addressed the vulnerability in version 16.30. No known exploits in the wild have been reported.
Potential Impact
Successful exploitation results in remote, unauthenticated attackers executing arbitrary OS commands as the CSF service account, potentially leading to full compromise of the affected system depending on the privileges of that account. The vulnerability has a CVSS 4.0 score of 9.2, indicating critical severity with high impact on confidentiality, integrity, and availability.
Mitigation Recommendations
WebPros has released an official fix in version 16.30 of ConfigServer Security & Firewall. Users should upgrade to version 16.30 or later to remediate this vulnerability. Other forks or independently maintained versions should be evaluated and patched accordingly if vulnerable. No other mitigation or temporary workaround is indicated.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- hackerone
- Date Reserved
- 2026-07-22T15:00:06.103Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6aa2dccdf76d26f025573a83
Added to database: 09/10/2026, 16:37:33 UTC
Last enriched: 09/10/2026, 16:51:35 UTC
Last updated: 09/10/2026, 17:00:15 UTC
Views: 4
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