CVE-2024-29761 in WP Post Disclaimer Plugin
Summary
by MITRE • 03/27/2024
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Krunal Prajapati WP Post Disclaimer allows Stored XSS.This issue affects WP Post Disclaimer: from n/a through 1.0.3.
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Analysis
by VulDB Data Team • 04/12/2025
The vulnerability identified as CVE-2024-29761 represents a critical cross-site scripting flaw within the WP Post Disclaimer plugin for WordPress, specifically impacting versions ranging from the initial release through 1.0.3. This stored cross-site scripting vulnerability arises from inadequate input sanitization during the web page generation process, creating a persistent security risk that can be exploited by malicious actors to execute arbitrary JavaScript code within the context of affected user browsers. The flaw resides in how the plugin processes and renders user-supplied content, failing to properly neutralize potentially dangerous input before it is stored and subsequently displayed on web pages.
The technical nature of this vulnerability aligns with CWE-79, which specifically addresses cross-site scripting flaws in web applications. This classification indicates that the plugin does not adequately validate or sanitize user input before incorporating it into dynamically generated web content, allowing malicious scripts to be permanently stored within the application's database. The stored nature of this XSS vulnerability means that once an attacker successfully injects malicious code through the plugin's input fields, the script will execute every time a user accesses the affected page, regardless of whether they are authenticated or not. The vulnerability specifically affects the plugin's handling of disclaimer text and other user-contributed content that gets rendered on WordPress pages, creating a persistent threat vector that can be exploited across multiple user sessions.
From an operational perspective, this vulnerability poses significant risks to WordPress site administrators and their visitors. Attackers can leverage this stored XSS flaw to steal session cookies, redirect users to malicious websites, deface the affected web pages, or even execute more sophisticated attacks such as credential harvesting or privilege escalation within the compromised WordPress environment. The impact extends beyond simple data theft, as the malicious scripts can manipulate the user interface, inject additional content, or establish persistent backdoors within the compromised site. Given that this vulnerability affects a plugin that generates disclaimers for posts, attackers could potentially inject malicious code into high-traffic areas of the website, amplifying the potential damage and reach of their attacks.
Security mitigation strategies for this vulnerability should prioritize immediate remediation through plugin updates to versions that address the XSS flaw, as recommended by the vendor and security advisory organizations. System administrators should implement input validation and sanitization measures at multiple layers, including server-side validation of all user-supplied content before storage and output encoding of all dynamic content before rendering. The implementation of Content Security Policy headers can provide additional protection against script execution, while regular security audits of installed plugins and themes should be conducted to identify similar vulnerabilities. Organizations should also consider implementing web application firewalls to detect and block suspicious input patterns that may indicate XSS attack attempts, and establish monitoring procedures to detect unauthorized modifications to website content that could indicate successful exploitation of this vulnerability. The ATT&CK framework categorizes this type of vulnerability under T1059.001 for command and script injection, highlighting the need for comprehensive defensive measures across multiple security domains to prevent exploitation.