Executive Summary

CVE-2026-28113 is a Reflected Cross-Site Scripting (XSS) vulnerability in the WordPress Ultimate Learning Pro Plugin versions up to and including 3.9.1.

This vulnerability allows an attacker to inject malicious scripts, such as redirects, advertisements, or other HTML payloads, which execute when site visitors access the compromised pages.

Exploitation requires user interaction, typically involving a privileged user clicking a malicious link, visiting a crafted page, or submitting a form.

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Impact Analysis

This vulnerability can lead to attackers executing malicious scripts in the context of the affected website, potentially resulting in unauthorized actions such as redirects to malicious sites, display of unwanted advertisements, or theft of sensitive information.

Since exploitation requires user interaction, users or administrators might be tricked into performing actions that trigger the malicious payload.

No official patch is currently available, so the site remains vulnerable unless mitigation measures are applied.

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Compliance Impact

I don't know

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Detection Guidance

[{'type': 'paragraph', 'content': "This vulnerability is a reflected Cross Site Scripting (XSS) issue in the Ultimate Learning Pro WordPress plugin up to version 3.9.1. Detection typically involves monitoring for suspicious HTTP requests that include malicious script payloads in URLs or form submissions targeting the plugin's pages."}, {'type': 'paragraph', 'content': 'Since no official patch is available, detection can be aided by using web application firewall (WAF) rules or scanning tools that look for reflected XSS patterns in HTTP requests.'}, {'type': 'paragraph', 'content': 'Specific commands are not provided in the resources, but common approaches include using tools like curl or wget to test for reflected script injection by sending crafted requests and observing responses for script execution or reflection.'}] [1]

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Mitigation Strategies

Immediate mitigation steps include applying Patchstack’s mitigation rule designed to block attacks targeting this vulnerability until an official patch is released.

Additionally, users should avoid clicking on suspicious links or submitting untrusted forms that could exploit the reflected XSS vulnerability.

Monitoring and restricting user input and access to the affected plugin pages can also reduce risk.

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