CVE-2026-78563 in NotificationX Pro Plugin
Summary
by MITRE • 08/25/2026
The NotificationX Pro plugin for WordPress is vulnerable to Stored Cross-Site Scripting in all versions up to, and including, 3.1.4 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers 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 • 08/25/2026
The NotificationX Pro plugin for WordPress presents a significant security risk due to the presence of Stored Cross-Site Scripting vulnerabilities across all versions up to and including 3.1.4. This class of vulnerability stems from insufficient input sanitization and output escaping mechanisms within the application code, allowing malicious actors to inject arbitrary web scripts into pages that are subsequently served to other users. The core technical flaw lies in the failure to properly validate or encode user-supplied data before it is stored in the database and later rendered in a browser context without adequate protection against script execution.
From an operational perspective, this vulnerability enables unauthenticated attackers to persist malicious payloads directly on the target WordPress site. Unlike reflected XSS attacks that require tricking users into clicking specially crafted links, stored vulnerabilities remain active until manually removed by an administrator or developer. When any user accesses a page containing the injected payload, their browser executes the script in the context of the vulnerable website. This can lead to severe consequences such as session hijacking, where attackers steal authentication cookies to impersonate legitimate users; defacement of the site content; redirection to malicious phishing sites designed to harvest credentials or distribute malware; and potentially full account takeover if administrative privileges are compromised through stolen sessions.
The technical nature of this flaw aligns with CWE-79, which categorizes improper neutralization of input during web page generation as a Cross-site Scripting weakness. The lack of output escaping means that special characters like angle brackets, quotes, and ampersands are not converted into their HTML entity equivalents before being displayed to end-users. This allows the browser to interpret injected JavaScript code as executable content rather than plain text data. Furthermore, because the attack vector does not require authentication, it significantly lowers the barrier for exploitation, making even novice threat actors capable of launching effective attacks against sites running vulnerable versions of NotificationX Pro.
In terms of industry mapping, this vulnerability corresponds to MITRE ATT&CK technique T1059.007, which covers JavaScript execution within web browsers as part of Command and Control or Collection phases depending on the payload intent. Attackers may leverage this capability for initial access if combined with social engineering tactics that prompt users to visit compromised pages, or they might use it for persistent data exfiltration by sending stolen information back to a remote server controlled by the attacker. The persistence aspect is particularly dangerous as it allows long-term surveillance and manipulation of site visitors without further interaction from the attacker after initial injection.
To mitigate this risk, immediate action is required to update the NotificationX Pro plugin to version 3.1.5 or later where these input validation and output encoding issues have been addressed by the developers. Administrators should also implement a Web Application Firewall that can detect and block common XSS patterns in HTTP requests before they reach the application layer. Additionally, enforcing Content Security Policy headers with strict directives regarding script sources can provide an additional defense-in-depth measure to prevent unauthorized scripts from executing even if injection attempts succeed. Regular security audits and code reviews focusing on input sanitization practices are recommended to prevent similar vulnerabilities in future updates or custom integrations involving this plugin.