CVE-2025-13126 is a SQL Injection vulnerability classified under CWE-89, affecting the wpForo Forum plugin for WordPress, versions up to and including 2.4.12. The vulnerability stems from insufficient escaping and lack of proper preparation of SQL queries involving the `post_args` and `topic_args` parameters. These parameters accept user-supplied input that is directly incorporated into SQL statements without adequate sanitization, enabling attackers to append malicious SQL code. This flaw allows unauthenticated attackers to execute arbitrary SQL queries on the backend database, potentially extracting sensitive information such as user credentials, private messages, or other confidential data stored within the forum's database. The vulnerability has a CVSS 3.1 base score of 7.5, indicating high severity, with an attack vector of network (remote), no privileges required, and no user interaction needed. The scope is unchanged, and the impact is primarily on confidentiality, with no direct impact on integrity or availability reported. No patches are currently linked, and no known exploits have been observed in the wild, but the vulnerability's characteristics make it a prime target for exploitation once weaponized. The vulnerability was reserved in November 2025 and published in December 2025. The wpForo plugin is widely used in WordPress forums, making this a significant threat to websites relying on this software for community engagement.

For European organizations, this vulnerability poses a significant risk to the confidentiality of sensitive data stored in wpForo forums. Exploitation can lead to unauthorized data disclosure, including user personal information, login credentials, and private communications, potentially resulting in privacy violations and regulatory non-compliance under GDPR. Public-facing forums are particularly vulnerable as the attack requires no authentication or user interaction, allowing remote attackers to exploit the flaw at scale. This can damage organizational reputation, lead to data breaches, and incur financial penalties. Additionally, extracted data could be used for further attacks such as phishing or credential stuffing. The lack of impact on integrity and availability reduces the risk of data manipulation or service disruption but does not diminish the severity of data leakage. Organizations with large user bases or forums hosting sensitive discussions are at elevated risk. The vulnerability also increases the attack surface for threat actors targeting European entities, especially those in sectors like finance, healthcare, and government where forum data may be sensitive.

Immediate mitigation involves upgrading the wpForo Forum plugin to a patched version once released by the vendor. Until a patch is available, organizations should implement strict input validation and sanitization on the `post_args` and `topic_args` parameters at the web application level to block malicious SQL payloads. Deploying a Web Application Firewall (WAF) with custom rules to detect and block SQL Injection patterns targeting these parameters can provide effective temporary protection. Regularly monitoring web server logs for suspicious query strings and unusual database query patterns can help detect attempted exploitation. Restricting database user permissions to the minimum necessary can limit the impact of a successful injection. Organizations should also conduct security audits and penetration testing focused on SQL Injection vectors in their WordPress installations. Finally, educating administrators about the risks and ensuring timely updates of all WordPress plugins is critical to maintaining security.