Bylancer Quicklancer is a PHP-based freelance marketplace script that allows users to create platforms for hiring freelancers. It is used by individuals and companies to post jobs, manage freelancers, and handle payments. The software is popular for building customized freelance platforms. Quicklancer integrates various features such as job posting, bidding, and escrow services. It is especially favored by those looking for an affordable and customizable solution for freelance marketplaces.
The vulnerability exists in the "range2" parameter within the Quicklancer platform, allowing an attacker to perform SQL injection. This vulnerability can be exploited without authentication, making it particularly dangerous. The attack vector involves injecting SQL queries into the database through a manipulated HTTP request. As a result, an attacker could gain unauthorized access to sensitive data or disrupt database operations.
The vulnerable endpoint in Quicklancer is the GET request to the /listing page, specifically targeting the "range2" parameter. The vulnerability allows for both time-based and boolean-based blind SQL injection. By manipulating this parameter, an attacker can execute arbitrary SQL commands, potentially extracting sensitive information or altering the database's content. The attack can be carried out remotely by an unauthenticated user, making it a high-risk issue.
If exploited, this vulnerability could lead to unauthorized data access, data leakage, or database corruption. An attacker could potentially retrieve user credentials, financial information, or other sensitive data. Additionally, the attacker might be able to alter or delete important data, leading to loss of service or integrity. This could severely impact the platform's operation, user trust, and overall security.
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References:
- Validate and sanitize user inputs to prevent SQL injection attacks.
- Use prepared statements or parameterized queries for database interactions.
- Implement proper error handling to avoid exposing sensitive information.
- Regularly update your software to patch known vulnerabilities.
- Conduct security audits and penetration testing to identify potential weaknesses.
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