CVE-2007-6158 in Proverbs Web Calendar
Summary
by MITRE
Multiple SQL injection vulnerabilities in caladmin.inc.php in Proverbs Web Calendar 1.1 and earlier allow remote attackers to execute arbitrary SQL commands via the (1) loginname (aka Username) and (2) loginpass (aka Password) parameters to caladmin.php.
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Analysis
by VulDB Data Team • 11/25/2025
The vulnerability identified as CVE-2007-6158 represents a critical security flaw in Proverbs Web Calendar version 1.1 and earlier systems, specifically targeting the caladmin.inc.php component. This issue manifests as multiple SQL injection vulnerabilities that directly compromise the authentication mechanism of the web calendar application. The vulnerability affects the loginname parameter, also known as Username, and the loginpass parameter, also known as Password, which are processed through the caladmin.php interface. These parameters are particularly susceptible because they are directly incorporated into SQL queries without proper input sanitization or parameterization, creating an exploitable pathway for malicious actors to manipulate the underlying database operations.
The technical exploitation of this vulnerability occurs when remote attackers submit specially crafted SQL commands through the loginname and loginpass parameters. When these parameters are processed by the vulnerable caladmin.inc.php script, the unvalidated input is concatenated directly into SQL query strings, allowing attackers to inject malicious SQL code that executes with the privileges of the web application's database user. This injection can potentially enable attackers to retrieve, modify, or delete database contents, bypass authentication mechanisms entirely, or escalate their privileges within the system. The vulnerability falls under CWE-89, which specifically addresses SQL injection flaws in software applications. The attack vector is particularly concerning as it targets the core authentication functionality, potentially allowing unauthorized access to calendar administrative features and sensitive user data stored within the database.
The operational impact of this vulnerability extends beyond simple unauthorized access to encompass complete database compromise and potential system infiltration. Successful exploitation could result in data breaches involving calendar entries, user credentials, and potentially other sensitive information stored within the application's database. The vulnerability's remote nature means that attackers can exploit it from anywhere on the internet without requiring physical access to the system, making it particularly dangerous for web-facing applications. From an adversarial perspective, this vulnerability aligns with ATT&CK technique T1190, which involves exploiting vulnerabilities in remote services to gain initial access to systems. Organizations running affected versions of Proverbs Web Calendar face significant risk of unauthorized administrative access, data exfiltration, and potential lateral movement within their network infrastructure. The vulnerability also demonstrates poor input validation practices that are commonly associated with insecure coding patterns and inadequate security testing during the software development lifecycle.
Mitigation strategies for CVE-2007-6158 must address both immediate remediation and long-term security improvements. The most effective immediate solution involves upgrading to a patched version of Proverbs Web Calendar, as the vulnerability has been resolved in subsequent releases. Organizations should also implement proper input validation and parameterized queries to prevent similar issues in other applications. Database access controls should be reviewed and hardened to limit the privileges of web application database users. Additionally, implementing web application firewalls and intrusion detection systems can help detect and block exploitation attempts. Security testing should include thorough input validation checks and SQL injection vulnerability assessments to identify and remediate similar weaknesses in other components of the application stack. The vulnerability serves as a reminder of the critical importance of secure coding practices and regular security assessments to prevent unauthorized database access and maintain overall system integrity.