CVE-2025-10126 in MyBrain Utilities Plugin
Summary
by MITRE • 09/10/2025
The MyBrain Utilities plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugins's 'mbumap' shortcode in all versions up to, and including, 1.0.8 due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
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Analysis
by VulDB Data Team • 09/10/2025
The vulnerability identified as CVE-2025-10126 affects the MyBrain Utilities plugin for WordPress, specifically targeting the 'mbumap' shortcode implementation. This represents a critical security flaw that undermines the integrity of WordPress installations by enabling malicious actors to execute persistent cross-site scripting attacks. The vulnerability exists within the plugin's handling of user-supplied attributes, where inadequate input sanitization and output escaping mechanisms fail to properly validate or escape potentially malicious content. The flaw impacts all versions of the plugin up to and including version 1.0.8, making it a widespread concern for WordPress administrators who have not yet updated their installations.
The technical nature of this vulnerability stems from the plugin's failure to implement proper security controls when processing shortcode parameters. When an authenticated user with contributor-level privileges or higher submits content containing malicious scripts through the 'mbumap' shortcode attributes, the system does not adequately sanitize this input before rendering it in the web page output. This creates a persistent XSS vector where the injected scripts become stored within the website's content and execute whenever any user accesses pages containing the malicious shortcode. The vulnerability operates under CWE-79 which specifically addresses Cross-Site Scripting flaws, and aligns with ATT&CK technique T1566.001 for Initial Access through spearphishing attachments, as attackers could exploit this to deliver malicious payloads to unsuspecting users.
The operational impact of this vulnerability extends beyond simple script execution, as it provides attackers with the ability to perform various malicious activities including session hijacking, data exfiltration, and privilege escalation within the WordPress environment. Authenticated attackers can leverage this vulnerability to inject scripts that could steal administrator credentials, modify website content, or redirect users to malicious domains. The stored nature of the vulnerability means that the malicious scripts persist indefinitely until manually removed, creating a long-term threat vector that can affect all users who access pages containing the compromised shortcode. This vulnerability particularly affects websites where contributors or authors have elevated privileges, as these users can inadvertently or maliciously introduce the XSS payloads into the system.
Mitigation strategies for CVE-2025-10126 should prioritize immediate plugin updates to the latest available version that contains the necessary security patches. System administrators must also implement additional protective measures including input validation at multiple layers, output encoding for all dynamic content, and regular security audits of plugin installations. The WordPress security community should enforce strict access controls and monitor user activities for suspicious shortcode usage patterns. Organizations should also consider implementing Content Security Policy headers to limit the execution of unauthorized scripts and establish regular vulnerability scanning procedures to identify similar flaws in other plugins or themes. Additionally, security awareness training for users with contributor-level access can help prevent accidental exploitation through social engineering tactics that might lead to the injection of malicious content.