CVE-2025-26937 in Icon List Block Plugin
Summary
by MITRE • 02/25/2025
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in bPlugins Icon List Block allows Stored XSS. This issue affects Icon List Block: from n/a through 1.1.3.
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Analysis
by VulDB Data Team • 02/25/2025
The vulnerability identified as CVE-2025-26937 represents a critical cross-site scripting weakness within the bPlugins Icon List Block plugin, specifically impacting versions ranging from an unspecified initial state through version 1.1.3. This flaw resides in the improper neutralization of input during web page generation, creating a persistent security risk that allows attackers to execute malicious scripts in the context of affected user sessions. The vulnerability falls under the well-established CWE-79 category for Cross-site Scripting, which is classified as a fundamental web application security flaw that enables attackers to inject client-side scripts into web pages viewed by other users. The specific nature of this vulnerability being stored XSS means that malicious payloads are not only executed during the initial page load but are persistently stored within the application's database or server-side storage, making the attack vector particularly dangerous as it can affect multiple users over extended periods. The attack occurs when the plugin fails to properly sanitize or escape user-supplied input before incorporating it into dynamically generated web content, allowing attackers to embed malicious JavaScript code within the icon list block configuration parameters. This stored nature of the vulnerability means that once an attacker successfully injects malicious code through a vulnerable input field, the payload remains active and will execute whenever users view the affected web page, creating a persistent threat that can be exploited across multiple sessions and user interactions.
The operational impact of this vulnerability extends beyond simple script execution to encompass potential data theft, session hijacking, and full compromise of user accounts within the affected WordPress environment. Attackers can leverage this stored XSS vulnerability to steal cookies, session tokens, and other sensitive information from authenticated users who visit pages containing the malicious icon list blocks. The vulnerability's presence in the Icon List Block plugin specifically means that any website utilizing this component could become a vector for delivering malicious payloads to unsuspecting users, potentially affecting thousands of WordPress installations across various domains and organizations. The exploitation process typically involves an attacker submitting malicious input through the plugin's configuration interface or through API endpoints that handle icon list data, where the application fails to validate or sanitize the input before storing and rendering it in subsequent web page requests. This creates a persistent threat that can be used for credential harvesting, redirecting users to malicious sites, defacement of web content, or even establishing backdoor access through more sophisticated attack chains that leverage the initial XSS compromise.
Mitigation strategies for CVE-2025-26937 require immediate action from affected organizations, including updating the bPlugins Icon List Block plugin to the latest available version that addresses this vulnerability. The recommended approach involves implementing comprehensive input validation and output escaping mechanisms, ensuring that all user-supplied data is properly sanitized before being processed or stored within the application. Organizations should also consider implementing Content Security Policy headers to limit the execution of unauthorized scripts, while maintaining regular security audits of all installed plugins to identify potential vulnerabilities. Additionally, the implementation of web application firewalls and security monitoring systems can help detect and prevent exploitation attempts, while regular security training for administrators can reduce the risk of successful social engineering attacks that might lead to exploitation. The vulnerability's classification under ATT&CK technique T1566.001 for "Phishing" and T1059.001 for "Command and Scripting Interpreter" highlights the multi-faceted nature of the threat, as attackers can combine this vulnerability with other attack vectors to establish persistent access and exfiltrate sensitive data. Organizations should also conduct thorough penetration testing to identify other potential XSS vulnerabilities within their web applications, as this type of flaw often indicates broader security weaknesses in input handling and output sanitization practices that can be exploited in similar ways across different components of the application stack.