CVE-2011-4810

WHMCompleteSolution 3.x-4.x - Unauthenticated Path Traversal via Template File Parameter

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2011-4810. PoCs published by ZxH-Labs.

AI-analyzed exploit summary This exploit demonstrates a Local File Inclusion (LFI) vulnerability in WHMCS versions 3.x and 4.x, allowing attackers to read arbitrary files on the server via path traversal in the 'templatefile' parameter in submitticket.php and downloads.php, and the 'report' parameter in reports.php.

Description

Multiple directory traversal vulnerabilities in WHMCompleteSolution (WHMCS) 3.x and 4.x allow remote attackers to read arbitrary files via the templatefile parameter to (1) submitticket.php and (2) downloads.php, and (3) the report parameter to admin/reports.php.

Exploits (1)

exploitdb WORKING POC VERIFIED
by ZxH-Labs · textwebappsphp
https://www.exploit-db.com/exploits/18088

This exploit demonstrates a Local File Inclusion (LFI) vulnerability in WHMCS versions 3.x and 4.x, allowing attackers to read arbitrary files on the server via path traversal in the 'templatefile' parameter in submitticket.php and downloads.php, and the 'report' parameter in reports.php.

Classification
Working Poc 90%
Attack Type
Info Leak
Complexity
Trivial
Reliability
Reliable
Target: WHMCS 3.x / 4.x
No auth needed
Prerequisites: Access to the vulnerable WHMCS installation
mistral-large-3 · analyzed Feb 16, 2026 Full analysis →

References (1)

Core 1
Core References
Exploit exploit x_refsource_exploit-db
http://www.exploit-db.com/exploits/18088

Scores

EPSS 0.0703
EPSS Percentile 93.4%

Details

CWE
CWE-22
Status published
Products (17)
whmcs/whmcompletesolution 3.0.0
whmcs/whmcompletesolution 4.0.0
whmcs/whmcompletesolution 4.0.1
whmcs/whmcompletesolution 4.0.2
whmcs/whmcompletesolution 4.1.0
whmcs/whmcompletesolution 4.1.1
whmcs/whmcompletesolution 4.1.2
whmcs/whmcompletesolution 4.2.0 (4 CPE variants)
whmcs/whmcompletesolution 4.2.1
whmcs/whmcompletesolution 4.3.0
... and 7 more
Published Dec 14, 2011
Tracked Since Feb 18, 2026