CVE-2011-4559

vtiger CRM < 5.2.1 - SQL Injection via Calendar Module onlyforuser Parameter

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2011-4559. PoCs published by Aung Khant.

AI-analyzed exploit summary This exploit demonstrates an SQL injection vulnerability in vtiger CRM 5.2.1 via the 'onlyforuser' parameter. The PoC includes crafted URLs that manipulate SQL queries to extract database version information or bypass authentication.

Description

SQL injection vulnerability in the Calendar module in vTiger CRM 5.2.1 and earlier allows remote attackers to execute arbitrary SQL commands via the onlyforuser parameter in an index action to index.php.

Exploits (1)

exploitdb WORKING POC VERIFIED
by Aung Khant · textwebappsphp
https://www.exploit-db.com/exploits/36208

This exploit demonstrates an SQL injection vulnerability in vtiger CRM 5.2.1 via the 'onlyforuser' parameter. The PoC includes crafted URLs that manipulate SQL queries to extract database version information or bypass authentication.

Classification
Working Poc 90%
Attack Type
Sqli
Complexity
Trivial
Reliability
Reliable
Target: vtiger CRM 5.2.1
No auth needed
Prerequisites: Access to the target application URL
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (6)

Core 6
Core References
Third Party Advisory, VDB Entry mailing-list x_refsource_bugtraq
http://www.securityfocus.com/archive/1/520006/100/0/threaded
Exploit mailing-list x_refsource_fulldisc
http://seclists.org/fulldisclosure/2011/Oct/224
Exploit vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/49948
Third Party Advisory, VDB Entry vdb-entry x_refsource_osvdb
http://osvdb.org/76138
Third Party Advisory, VDB Entry vdb-entry x_refsource_xf
https://exchange.xforce.ibmcloud.com/vulnerabilities/70344

Scores

EPSS 0.0139
EPSS Percentile 68.7%

Details

CWE
CWE-89
Status published
Products (16)
vtiger/vtiger_crm 1.0
vtiger/vtiger_crm 2.0
vtiger/vtiger_crm 2.0.1
vtiger/vtiger_crm 2.1
vtiger/vtiger_crm 3.0 (2 CPE variants)
vtiger/vtiger_crm 3.2
vtiger/vtiger_crm 4.0
vtiger/vtiger_crm 4.0.1
vtiger/vtiger_crm 4.2 (2 CPE variants)
vtiger/vtiger_crm 4.2.4
... and 6 more
Published Nov 28, 2011
Tracked Since Feb 18, 2026