CVE-2026-87973 in If-So Dynamic Content Plugin
Summary
by MITRE • 10/01/2026
The If-So Dynamic Content WordPress plugin before 1.10.2 does not sanitize a conversion name before storing it, nor escape it when rendering the analytics page, allowing users with editor-level access to store JavaScript that executes in the session of a higher-privileged user who views that page.
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Analysis
by VulDB Data Team • 10/01/2026
The vulnerability identified in If-So Dynamic Content versions prior to 1.10.2 represents a classic Stored Cross-Site Scripting (XSS) flaw rooted in insufficient input validation and output encoding within the WordPress plugin architecture. The core technical deficiency lies in the handling of conversion names, which are intended for analytics tracking purposes but are processed without adequate sanitization before being persisted to the database. When an administrator or editor with sufficient privileges creates a dynamic content variation, they can inject arbitrary JavaScript code into the name field. Because this data is stored directly without filtering out executable script tags or event handlers, it remains in the system's persistent storage ready for retrieval and rendering by other components of the application.
The operational impact escalates significantly when another user with higher privileges, such as an administrator, accesses the analytics page associated with that content variation. The plugin renders this stored data directly into the HTML output without applying proper escaping mechanisms to neutralize special characters or script blocks. Consequently, any JavaScript embedded in the conversion name is executed within the browser context of the viewing user. This execution occurs under the session cookies and permissions of the higher-privileged account, effectively bypassing standard access controls. The attacker does not need direct administrative credentials; instead, they leverage their editor-level access to plant the malicious payload, which then triggers upon a victim's routine interaction with the analytics dashboard.
From an industry standards perspective, this vulnerability aligns closely with CWE-79, known as Improper Neutralization of Input During Web Page Generation commonly referred to as Cross-site Scripting. Specifically, it falls under the Stored XSS subcategory where malicious scripts are permanently stored within target applications such as databases or comment sections. Furthermore, in terms of tactical mapping according to the MITRE ATT&CK framework for enterprise environments, this behavior corresponds to T1059 Command and Control scripting techniques, particularly JavaScript execution on local endpoints. The attack vector allows an adversary to establish a foothold by stealing session tokens, cookies, or performing actions as the authenticated user, which can lead to further compromise of the WordPress installation including database manipulation or defacement.
Mitigation strategies for this vulnerability require immediate updates to version 1.10.2 or later where these sanitization and escaping routines have been corrected. For environments unable to update immediately, administrators should restrict editor-level access to users who are fully trusted, as they possess the capability to inject malicious payloads into stored fields. Additionally implementing a Web Application Firewall can provide an additional layer of defense by filtering out common XSS patterns in HTTP requests before they reach the application logic. Regular security audits and code reviews focusing on input validation at entry points and output encoding at rendering layers are essential practices to prevent similar vulnerabilities across WordPress plugins and web applications generally.