Read the docs
TI-2026-47685 Aliases CVE-2026-67399GHSA-5jq9-2qvc-rc4h

Deserialization of untrusted data in WebPros WHMCS

Priority MEDIUM 49CWE-502Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-502.

Summary

Deserialization of untrusted data in WHMCS 9.0.0 before 9.0.8 and 8.0.0 before 8.13.7 allows remote attackers to execute arbitrary code.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00752 55th percentileScored 2026-11-07
Fix Fixed WHMCS (WebPros): 9.0.8, 8.13.7

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
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
WebProsWHMCS9.0.0 to before 9.0.8; 8.0.0 to before 8.13.79.0.8, 8.13.7Patch availableCNA
  • WHMCS VendorWebPros Affected 9.0.0 to before 9.0.8; 8.0.0 to before 8.13.7 Fixed in 9.0.8, 8.13.7 Patch available CNA

Remediation

  • Fix · CNA WHMCS (WebPros) Fixed in 9.0.8, 8.13.7

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-67399
  2. 2026-10-03 Alias added: GHSA-5jq9-2qvc-rc4h

References

Other 1

  • TI-2026-30342 WebPros cPanel and WHM Authentication Bypass via Login Flow KEVCVSS 4.0CRITICAL 9.3
  • TI-2026-46792 Eval injection in cPanel 11.138.0.0 and earlier allows remote authenticated users to execute arbitrary code as root. CVSS 4.0HIGH 8.7
  • TI-2025-40383 Plesk Obsidian versions 8.0.1 through 18.0.73 are vulnerable to a Denial of Service (DoS)… CVSS 3.1HIGH 7.5
  • TI-2026-23322 Incorrect privileges management and insufficient path filtering allow to read arbitrary… CVSS 3.1HIGH 8.6
  • TI-2026-23317 Authorization bypass in WebPros Comet Backup CVSS 4.0CRITICAL 9.9
  • TI-2026-47687 An insecure Apache configuration in ConfigServer Security & Firewall maps /usr/bin as CGI… CVSS 4.0CRITICAL 9.2
See all 50 →

Sources

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