CVE-2026-102396 in Ultimate Maps Plugin
Summary
by MITRE • 09/30/2026
Unauthenticated Cross Site Scripting (XSS) in Ultimate Maps by Supsystic <= 1.5.5 versions.
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Analysis
by VulDB Data Team • 09/30/2026
The vulnerability identified as an unauthenticated cross-site scripting flaw within the Ultimate Maps plugin for WordPress, specifically affecting versions up to and including 1.5.5, represents a significant security risk due to its lack of authentication requirements. This classification indicates that any user interacting with the affected website can exploit this weakness without needing valid credentials or prior login access. The core technical issue stems from insufficient input validation and sanitization mechanisms within the plugin's codebase when processing data submitted by users. When malicious scripts are injected into fields intended for legitimate map configurations, search queries, or marker descriptions, the application fails to properly escape these inputs before rendering them in the web page context. Consequently, the browser interprets the injected content as executable JavaScript rather than plain text, allowing the attacker's code to run within the security context of the victim’s session.
From a technical perspective, this vulnerability aligns with CWE-79, which is defined as Improper Neutralization of Input During Web Page Generation commonly known as Cross-site Scripting. The flaw typically occurs in dynamic web applications where user-supplied data is incorporated into HTML output without adequate encoding or validation. In the context of Ultimate Maps, an attacker could craft a malicious payload containing JavaScript code designed to perform actions on behalf of the victim. This might include stealing session cookies, capturing keystrokes, performing cross-site request forgery attacks against administrative functions if the victim has elevated privileges, or redirecting users to phishing sites. The unauthenticated nature of this vulnerability lowers the barrier for entry significantly, as it does not require social engineering tactics to trick an administrator into clicking a link; instead, the payload can be embedded in URLs shared via email, forums, or other public channels where any user might click through.
The operational impact of such a vulnerability extends beyond simple script execution and directly compromises the confidentiality, integrity, and availability of the web application and its users. For end-users visiting the site, the primary risk is account compromise if session tokens are stolen via document.cookie access. If an administrator or editor with higher privileges visits a page containing the malicious payload while logged in, the attacker gains full control over that administrative session. This can lead to complete takeover of the WordPress installation, including the ability to install further malware, modify site content, exfiltrate database contents, and use the server as a pivot point for attacking other internal systems. The presence of this vulnerability undermines trust in the website’s security posture and exposes sensitive user data stored within the associated database or session state.
Mitigation strategies must address both immediate remediation and long-term defensive postures. The most effective solution is to upgrade the Ultimate Maps plugin to a version greater than 1.5.5, where the developers have presumably implemented proper input sanitization and output encoding techniques such as using htmlspecialchars in PHP contexts or employing Content Security Policy headers to restrict script execution sources. For organizations unable to immediately patch due to compatibility concerns, temporary mitigations include implementing Web Application Firewall rules that detect and block common XSS payload patterns in HTTP requests targeting map-related endpoints. Additionally, enforcing strict Content Security Policy directives can limit the impact by preventing inline scripts from executing unless explicitly whitelisted. Regular security audits and code reviews focusing on input handling are essential to prevent similar vulnerabilities in future updates or custom integrations involving third-party plugins.
This vulnerability is also relevant to MITRE ATT&CK framework techniques, particularly T1059 which covers Command and Scripting Interpretation, as the executed JavaScript acts as a script interpreter within the browser environment. Furthermore, it relates to T1204 User Execution if the attack relies on social engineering to get users to visit malicious links containing the payload. Understanding these mappings helps security teams prioritize response efforts based on known adversary behaviors associated with web-based exploitation chains. By treating unauthenticated XSS not just as a client-side issue but as a potential gateway for server compromise and data exfiltration, organizations can better allocate resources toward robust input validation frameworks and continuous monitoring of application behavior anomalies that may indicate active exploitation attempts.