CVE-2025-11879 is an authorization vulnerability in the GenerateBlocks plugin for WordPress, identified as CWE-285 (Improper Authorization). The issue arises because the 'get_option_rest' function lacks a proper capability check, allowing authenticated users with contributor-level permissions or higher to access arbitrary WordPress options via the REST API. WordPress options often contain sensitive configuration data, including SMTP credentials, API keys, and other secrets stored by various plugins. This vulnerability enables an attacker to read such sensitive data without requiring administrator privileges or user interaction, increasing the risk of data leakage and subsequent attacks such as email spoofing or API abuse. The vulnerability affects all versions up to and including 2.1.1 of GenerateBlocks. The CVSS 3.1 base score is 6.5, reflecting a medium severity with high confidentiality impact but no impact on integrity or availability. The attack vector is network-based with low attack complexity and requires only low privileges (contributor). No patches were linked at the time of reporting, and no known exploits have been observed in the wild. The vulnerability is significant because contributor-level access is commonly granted to trusted users such as content creators, making it a realistic threat vector. Organizations using this plugin should prioritize remediation to prevent unauthorized data disclosure.

For European organizations, this vulnerability poses a significant risk to the confidentiality of sensitive configuration data stored within WordPress sites using the GenerateBlocks plugin. Exposure of SMTP credentials can lead to email spoofing or phishing campaigns originating from legitimate domains, damaging brand reputation and trust. Disclosure of API keys and other secrets can facilitate further compromise of integrated services or cloud resources. Since contributor-level access is often granted to internal users or third-party collaborators, the attack surface includes insider threats or compromised contributor accounts. The vulnerability does not affect integrity or availability directly but can be a stepping stone for more severe attacks. Organizations with high reliance on WordPress for public-facing or internal sites, especially those handling sensitive customer or business data, face increased risk. The absence of known exploits reduces immediate urgency but does not eliminate the threat, as attackers may develop exploits once the vulnerability is public. Failure to remediate could lead to regulatory compliance issues under GDPR if personal data is indirectly exposed or if the breach leads to further data compromise.

1. Immediately audit user roles and permissions to ensure contributor-level access is granted only to trusted users. 2. Monitor REST API access logs for unusual or unauthorized requests targeting the 'get_option_rest' endpoint or related plugin functions. 3. Apply principle of least privilege by restricting contributor capabilities where possible, or temporarily downgrade contributor accounts until a patch is available. 4. Stay informed on updates from the GenerateBlocks vendor and apply security patches promptly once released. 5. Consider implementing Web Application Firewalls (WAF) rules to detect and block suspicious REST API calls that attempt to access options data. 6. Conduct internal security awareness training to reduce risk of credential compromise for contributor accounts. 7. Review and rotate exposed credentials (SMTP, API keys) if any suspicious activity is detected or after patching. 8. Employ security plugins that can enforce capability checks or restrict REST API access based on user roles as an interim control. 9. Regularly back up WordPress configurations and data to enable recovery in case of compromise. 10. Engage in proactive vulnerability scanning and penetration testing focused on WordPress plugins to identify similar authorization issues.