CVE-2025-68509 Scanner

The User Submitted Posts plugin is a tool used in WordPress websites to allow users to submit content directly from the front end. This plugin is typically utilized by bloggers and website administrators who want to encourage community involvement by offering guest post options. Its ease of use and ability to streamline user-generated content make it popular among content creators and marketers. Websites using the WordPress CMS often adopt this plugin to boost user interaction and diversify content. By providing a simple form on the site, it enables site visitors to contribute without needing back-end access, which maintains overall site security while enhancing content variation.

The tested vulnerability in the User Submitted Posts plugin is an Open Redirect, a situation where a website inadvertently allows redirection to an untrusted location. This vulnerability arises due to insufficient validation of input parameters, specifically the redirect-override' POST parameter, within the plugin. Open Redirect is a common web security issue that can be exploited to carry out phishing attacks and unauthorized data collection. In this instance, the lack of adequate input validation allows unauthenticated attackers to redirect site visitors to potentially harmful websites. This vulnerability can have significant impacts if not adequately addressed, particularly in high-traffic websites where user trust is paramount.

Technical details reveal that the plugin fails to check the legitimacy of URLs or the trustworthiness of destinations when processing the redirect-override' parameter. The issue lies primarily in the server-side processing of HTTP POST requests, where parameters can be manipulated through form submissions. The vulnerable endpoint does not verify if the URL provided leads to an external domain, allowing attackers to exploit this oversight. Through crafted HTTP POST requests, malicious users can modify these parameters, leading unsuspecting users to phishing sites or malware-laden locations. This process involves manipulating typical web forms that include user-submitted data provisions.

The impacts of exploiting this Open Redirect vulnerability are severe, as it can lead to user data theft, loss of user trust, and damage to the website's reputation. Visitors redirected to malicious sites risk having their login credentials stolen, which might result in further compromise of their accounts on WordPress or other associated networks. The exploitation of this vulnerability can also facilitate phishing attacks, where unsuspecting users provide sensitive information on duplicated login or data entry forms hosted on phishing sites. Furthermore, a successful attack could lead to broader security incidents, affecting other users and compromising website integrity.

REFERENCES

• https://www.wordfence.com/threat-intel/vulnerabilities/wordpress-plugins/user-submitted-posts/user-submitted-posts-20251121-unauthenticated-open-redirect
• https://plugins.trac.wordpress.org/changeset?old_path=/user-submitted-posts/tags/20251121&new_path=/user-submitted-posts/tags/20251210