CVE-2006-5591 in PacPoll
Summary
by MITRE
Multiple SQL injection vulnerabilities in Admin/check.asp in PacPoll 4.0 and earlier allow remote attackers to execute arbitrary SQL commands via the (1) uid and (2) pwd parameters.
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Analysis
by VulDB Data Team • 04/25/2026
The vulnerability identified as CVE-2006-5591 represents a critical security flaw in PacPoll version 4.0 and earlier, specifically within the Admin/check.asp component. This issue manifests as multiple SQL injection vulnerabilities that fundamentally compromise the application's database security mechanisms. The vulnerability affects the authentication process by exposing the uid and pwd parameters to malicious input manipulation, creating pathways for unauthorized database access and potential system compromise.
The technical flaw resides in the improper handling of user input within the Admin/check.asp script where the uid and pwd parameters are directly incorporated into SQL query constructions without adequate sanitization or parameterization. This design flaw allows attackers to inject malicious SQL code through these parameters, effectively bypassing authentication mechanisms and gaining unauthorized access to the underlying database. The vulnerability operates under CWE-89 which classifies SQL injection as a weakness where untrusted data is incorporated into SQL commands without proper validation or escaping, making it one of the most prevalent and dangerous web application security flaws.
The operational impact of this vulnerability extends far beyond simple authentication bypass, as successful exploitation can lead to complete database compromise including data exfiltration, data modification, and potential lateral movement within the affected network. Attackers can leverage this vulnerability to execute arbitrary SQL commands, potentially escalating privileges, accessing sensitive user information, or even gaining shell access to the underlying database server. The implications are particularly severe for web applications that store sensitive user data, financial information, or personal identifiers, as the vulnerability provides attackers with direct database access that could result in significant data breaches and regulatory compliance violations.
Organizations affected by this vulnerability should implement immediate mitigations including input validation and parameterized queries to prevent SQL injection attacks. The recommended defensive measures include implementing proper input sanitization, using stored procedures with parameterized queries, and applying the latest security patches from the vendor. Additionally, network segmentation and database access controls should be strengthened to limit the potential damage from successful exploitation attempts. This vulnerability aligns with ATT&CK technique T1190 which covers exploitation of remote services, and T1071.005 which covers application layer protocol usage, particularly focusing on database communication protocols that are vulnerable to injection attacks. The remediation process should also include comprehensive security testing and code review practices to identify similar vulnerabilities in other application components and prevent future incidents of this nature.