by Kastro
Paper/Archive/CVE-2026-65638

CVE-2026-65638

WebPros ConfigServer Security & Firewall — Improper escaping of a request URL in ConfigServer Security & Firewall allows an unauthenticated remote attacker to execute arbitrary co…

EPSS 2%CVSS 9.2
critical.is priorityof 100
44
CVSS 9.2 (CNA)9.2 / 10 × 3027.6Not in CISA KEV+300.0EPSS percentile 83.5.835 × 2016.7No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
ConfigServer Security & Firewall14.00 – < 16.3016.30CNA
ConfigServer Security & Firewall14.00–CNA

Scores by source

hackerone (CNA)9.2CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:N
CISA ADPSSVCExploitation: none · Automatable: no · Technical impact: total

References

refsupport.cpanel.net/hc/en-us/articles/43387915588375-Security-CVE-2026-65638-CSF-Security-Release