A high-severity SQL Injection vulnerability has been identified in the "My auctions allegro" plugin for WordPress. An unauthenticated attacker could exploit this flaw by sending a malicious request to gain unauthorized access to the website's database, potentially leading to data theft, modification, or complete system compromise.

The "My auctions allegro" plugin fails to properly sanitize user-supplied input in the ‘auction_id’ parameter before using it in a database query. An attacker can inject malicious SQL commands into this parameter. Successful exploitation allows the attacker to execute arbitrary SQL queries on the backend database, bypassing security measures to access, modify, or delete sensitive information.

This vulnerability presents a high risk to the organization, reflected by its CVSS score of 7.5. Successful exploitation could lead to a significant data breach, exposing sensitive customer information, user credentials, or other confidential data stored in the database. The potential consequences include severe reputational damage, financial loss from fraud or recovery costs, and potential regulatory fines for non-compliance with data protection standards. Furthermore, an attacker could deface the website or use the compromised database as a pivot point for further attacks on the internal network.

Immediate Action:

• Identify all WordPress instances utilizing the "My auctions allegro" plugin.
• Update the plugin immediately to the latest version available from the vendor (a version greater than 3).
• If the plugin is no longer required for business operations, it should be deactivated and completely removed to eliminate the attack surface.

Proactive Monitoring:

• Review web server access logs for any requests containing suspicious patterns in the ‘auction_id’ parameter, such as SQL keywords (SELECT, UNION, INSERT), comment characters (--, #), or other common injection payloads.
• Monitor database logs for unusual, malformed, or long-running queries that could indicate an attempted or successful exploitation.
• Implement alerting for multiple failed login attempts or unusual database activity originating from the web server.

Compensating Controls:

• Deploy a Web Application Firewall (WAF) with rules specifically designed to detect and block SQL Injection attacks. This can provide a layer of protection if immediate patching is not feasible.
• Ensure the database user account associated with the WordPress application operates with the principle of least privilege, limiting its permissions to only what is necessary for the application to function. This can reduce the impact of a successful injection attack.
• Regularly back up the website and database to ensure data can be restored in the event of a compromise.

Public Exploit Available: false

Due to the high severity of this vulnerability, immediate remediation is strongly recommended. Organizations must prioritize identifying and updating all vulnerable instances of the "My auctions allegro" plugin to the latest patched version. Although this CVE is not currently listed in the CISA KEV catalog, the ease of exploitation for SQL Injection flaws means that the risk of attack will increase significantly if a public exploit becomes available. Proactive patching is the most effective defense against this threat.