CVE-2025-49903 identifies a missing authorization vulnerability in the bdthemes ZoloBlocks WordPress plugin, specifically affecting versions up to 2.3.11. The root cause is incorrectly configured access control security levels, which means that certain actions or resources intended to be restricted can be accessed or manipulated by unauthorized users. This vulnerability allows attackers to bypass authorization checks, potentially enabling them to modify website content, inject malicious code, or access sensitive data managed through the plugin. Since ZoloBlocks is a page builder plugin, unauthorized changes could compromise website integrity and confidentiality. The vulnerability does not require authentication or user interaction, which lowers the barrier for exploitation. Although no known exploits have been reported in the wild yet, the publication of this vulnerability signals a significant risk for websites relying on ZoloBlocks. The absence of a CVSS score necessitates an assessment based on the impact on confidentiality, integrity, and availability, as well as ease of exploitation and scope. The vulnerability primarily impacts confidentiality and integrity, with potential indirect effects on availability if malicious content disrupts site operations. The plugin’s market penetration in Europe, combined with the widespread use of WordPress, makes this a relevant threat for European organizations. The vulnerability was reserved in June 2025 and published in October 2025, indicating recent discovery and disclosure.

For European organizations, this vulnerability poses a risk of unauthorized access to website management functions, potentially leading to unauthorized content changes, data leakage, or injection of malicious scripts. This can damage organizational reputation, lead to data breaches involving customer or internal data, and disrupt business operations reliant on web presence. Given the plugin’s role in website construction, attackers could deface sites or implant backdoors for persistent access. The lack of authentication requirement means attackers can exploit this remotely without credentials, increasing the threat surface. Organizations in sectors with high regulatory requirements for data protection (e.g., finance, healthcare, government) face increased compliance risks if exploited. The impact on confidentiality and integrity is significant, while availability impact is moderate but possible if the website is defaced or taken offline. The absence of known exploits suggests a window for proactive mitigation before active attacks emerge.

Organizations should immediately inventory their WordPress installations to identify the use of bdthemes ZoloBlocks plugin, particularly versions up to 2.3.11. Until an official patch is released, restrict access to the WordPress admin interface using IP whitelisting, VPNs, or multi-factor authentication to reduce exposure. Review and harden access control configurations within the plugin settings to ensure only authorized roles have permissions to critical functions. Monitor website logs for unusual activity indicative of unauthorized access attempts. Employ web application firewalls (WAFs) with custom rules to detect and block suspicious requests targeting ZoloBlocks endpoints. Plan to apply vendor patches promptly once available and test updates in a staging environment before production deployment. Conduct security awareness training for administrators on the risks of unauthorized access and the importance of timely patching. Consider implementing integrity monitoring tools to detect unauthorized changes to website content or plugin files. Engage with bdthemes support channels to track patch release status and vulnerability updates.