CVE-2026-102384 in Lite Plugin
Summary
by MITRE • 09/30/2026
Author Cross Site Scripting (XSS) in Supreme Modules Lite <= 2.5.63 versions.
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Analysis
by VulDB Data Team • 09/30/2026
The vulnerability identified as an Author-level Cross-Site Scripting flaw within Supreme Modules Lite, affecting versions up to and including 2.5.63, represents a significant security risk for websites utilizing this WordPress plugin. This specific weakness stems from insufficient input validation and output encoding mechanisms when handling user-supplied data associated with the author role. In typical web application architectures, particularly those built on content management systems like WordPress, different roles possess varying levels of trust and access privileges. The Author role is generally granted permissions to create, edit, and publish posts, but it should not have administrative capabilities that allow for direct manipulation of site configuration or execution of arbitrary scripts. However, in this instance, the application fails to properly sanitize inputs provided by users with author-level credentials before processing them or rendering them back into the browser context.
From a technical perspective, the flaw allows an attacker who has authenticated as an Author on the affected website to inject malicious client-side scripts into web pages viewed by other users. This is typically achieved through fields such as post titles, content bodies, or metadata inputs where special characters are not adequately escaped. When these unsanitized inputs are stored in the database and subsequently retrieved for display, the browser interprets the injected script code as part of the page's legitimate HTML structure. Consequently, the malicious JavaScript executes within the security context of the victim user’s session. This execution environment grants the attacker access to sensitive information such as cookies, session tokens, or local storage data that are accessible via client-side scripts. The vulnerability aligns with CWE-79, which classifies improper neutralization of input during web page generation, commonly known as Cross-Site Scripting.
The operational impact of this vulnerability is substantial because it facilitates persistent attacks without requiring the attacker to have administrative privileges. Since Authors can publish content that remains on the site indefinitely, a malicious script injected by an Author will persist and execute every time any user views the compromised post or page. This persistence distinguishes stored XSS from reflected variants, making it particularly dangerous for long-term data exfiltration or session hijacking campaigns. Attackers can leverage this capability to steal administrative credentials if they trick administrators into viewing the malicious content while logged in with elevated privileges. Furthermore, the attacker could redirect users to phishing sites, deface the website by altering its visual presentation, or distribute malware through drive-by download techniques that exploit browser vulnerabilities triggered by the injected script.
In terms of threat modeling and adversary behavior, this vulnerability maps directly to several tactics within the MITRE ATT&CK framework for enterprise security. Specifically, it corresponds to T1059, Command and Control using scripting interpreters, as well as T1204, User Execution, if the attack involves tricking users into clicking links or interacting with content in a way that triggers further malicious actions. The persistence of the payload also aligns with T1189, Drive-by Compromise, where victims are compromised without any direct interaction beyond viewing the page. These mappings highlight how a seemingly minor input validation flaw can serve as an entry point for broader compromise scenarios involving credential theft and lateral movement within the web application ecosystem.
To mitigate this vulnerability, immediate action is required to update the Supreme Modules Lite plugin to version 2.5.64 or later, where the developers have presumably implemented proper sanitization and encoding practices. For organizations unable to upgrade immediately due to compatibility constraints, a temporary workaround involves restricting Author-level users from posting content that includes HTML tags or special characters until an official patch is applied. Additionally, implementing Content Security Policy headers can help mitigate the impact of successful XSS attacks by restricting the sources from which scripts are allowed to load and execute. Regular security audits and code reviews focusing on input validation for all user-facing roles are essential preventive measures. Developers must ensure that output encoding is context-aware, distinguishing between HTML body contexts, attribute contexts, and JavaScript contexts, to prevent injection vectors across different parts of the application interface.