CVE-2007-6124 in Freelancers Script
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in signin.php in Softbiz Freelancers Script 1 allows remote attackers to inject arbitrary web script or HTML via the errmsg parameter.
Be aware that VulDB is the high quality source for vulnerability data.
Analysis
by VulDB Data Team • 04/03/2026
The vulnerability identified as CVE-2007-6124 represents a classic cross-site scripting flaw within the Softbiz Freelancers Script version 1, specifically affecting the signin.php component. This type of vulnerability falls under the CWE-79 category known as "Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')", which is one of the most prevalent and dangerous web application security flaws. The vulnerability manifests when the application fails to properly sanitize user input before incorporating it into dynamically generated web pages, creating an avenue for malicious actors to execute arbitrary scripts within the context of other users' browsers.
The technical exploitation of this vulnerability occurs through the errmsg parameter in the signin.php script, which serves as an entry point for attackers to inject malicious code. When users navigate to the sign-in page and encounter an error condition, the system displays error messages that are directly rendered without proper input sanitization. Attackers can craft malicious payloads containing javascript code or html tags within the errmsg parameter, which are then executed when the page loads and displays the error message to other users. This creates a persistent threat vector where a single compromised input can affect multiple users who view the vulnerable page.
The operational impact of this vulnerability extends beyond simple script execution, as it can enable attackers to perform various malicious activities including session hijacking, credential theft, and data exfiltration. The attacker can manipulate the victim's browser to send cookies or other sensitive information to a remote server controlled by the attacker, effectively compromising user sessions and potentially gaining unauthorized access to user accounts. Additionally, the vulnerability can be leveraged to deface the website, redirect users to malicious sites, or inject additional malicious content that persists until the vulnerable application is patched. This makes the vulnerability particularly dangerous for platforms handling user authentication and sensitive business data.
Mitigation strategies for CVE-2007-6124 should focus on implementing proper input validation and output encoding mechanisms throughout the application. The most effective approach involves sanitizing all user-provided input before it is processed or displayed, particularly in error handling scenarios where the errmsg parameter is utilized. Implementing a robust content security policy can also provide additional protection layers against script execution. Organizations should also consider employing web application firewalls that can detect and block malicious payloads targeting XSS vulnerabilities. Regular security assessments and code reviews should be conducted to identify similar input handling issues within the application. The vulnerability demonstrates the critical importance of following secure coding practices and adhering to the principle of least privilege in web application development, as outlined in various security frameworks including the OWASP Top Ten and NIST cybersecurity guidelines. This particular vulnerability serves as a reminder of how seemingly minor input validation gaps can create significant security risks in web applications handling user authentication processes.