CVE-2025-58249 is a vulnerability identified in the Themeum Qubely WordPress plugin, specifically affecting versions up to 1.8.14. The vulnerability is categorized under CWE-201, which involves the insertion of sensitive information into sent data. This means that the plugin, when processing or transmitting data, inadvertently includes sensitive information that should not be exposed. The vulnerability allows an attacker with at least low-level privileges (PR:L) to retrieve embedded sensitive data without requiring user interaction (UI:N). The attack vector is network-based (AV:N), indicating that exploitation can occur remotely over the network. The vulnerability does not impact the integrity or availability of the system but compromises confidentiality to a limited extent (C:L/I:N/A:N). The CVSS 3.1 base score is 4.3, reflecting a medium severity level. No known exploits are currently reported in the wild, and no patches have been linked yet. The issue was reserved in late August 2025 and published in September 2025. Since Qubely is a WordPress plugin used for building and customizing websites, the vulnerability likely arises from improper handling or logging of sensitive data within plugin operations, potentially exposing user credentials, API keys, or other confidential information embedded in data sent from the plugin. Attackers with some level of access to the WordPress environment could exploit this to extract sensitive data, which could then be leveraged for further attacks or data breaches.

For European organizations using the Qubely plugin, this vulnerability poses a risk primarily to the confidentiality of sensitive information managed or transmitted via their WordPress sites. Since WordPress is widely used across Europe for corporate websites, e-commerce, and content management, any sensitive data leakage could lead to privacy violations, regulatory non-compliance (e.g., GDPR), and reputational damage. Although the vulnerability requires some level of privilege, many WordPress sites have multiple users with varying access levels, increasing the risk of exploitation from insider threats or compromised accounts. The exposure of sensitive data could facilitate further attacks such as phishing, credential stuffing, or lateral movement within the organization’s network. Given the medium severity and lack of impact on integrity or availability, the immediate operational disruption risk is low; however, the confidentiality breach implications are significant, especially for organizations handling personal data or intellectual property.

European organizations should take the following specific steps: 1) Immediately audit WordPress installations to identify the use of the Qubely plugin and verify the version in use. 2) Apply any available updates or patches from Themeum as soon as they are released; if no patch is available, consider temporarily disabling the plugin to prevent data leakage. 3) Restrict user privileges within WordPress to the minimum necessary, reducing the number of users who can exploit this vulnerability. 4) Monitor network traffic and logs for unusual data transmissions that might indicate exploitation attempts. 5) Conduct a thorough review of sensitive data handling policies within WordPress plugins and ensure sensitive information is not unnecessarily embedded in sent data. 6) Implement Web Application Firewalls (WAF) with rules tailored to detect and block suspicious requests targeting the plugin. 7) Educate administrators and users about the risks and signs of exploitation to improve detection and response.