CVE-2026-65882 in Extension
Summary
by MITRE • 07/28/2026
Joomla Extension - joomdle.com - Reflected XSS vulnerability in Joomdle < 3.1.1 - The goto url parameter of the moodle wrapper endpoint allowed a reflected XSS vector.
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Analysis
by VulDB Data Team • 07/28/2026
The vulnerability identified in Joomdle versions prior to 3.1.1 represents a critical security flaw that exposes users to reflected cross-site scripting attacks through the moodle wrapper endpoint. This issue specifically targets the goto url parameter which fails to properly sanitize user input before processing, creating an avenue for malicious actors to inject arbitrary javascript code into web responses. The vulnerability resides within the Joomla extension ecosystem and affects installations where Joomdle is used to integrate Moodle learning management system functionality with Joomla websites.
The technical implementation of this flaw occurs when the moodle wrapper endpoint processes the goto url parameter without adequate input validation or output encoding mechanisms. When a user visits a maliciously crafted URL containing XSS payloads in the goto parameter, the web application reflects this content back to the user's browser without proper sanitization. This creates an environment where attackers can execute scripts within the victim's browser context, potentially leading to session hijacking, credential theft, or redirection to malicious sites. The vulnerability follows the CWE-79 pattern of cross-site scripting where untrusted data flows from web application input directly into web output without proper sanitization.
The operational impact of this reflected XSS vulnerability extends beyond simple script execution as it can enable attackers to manipulate user sessions and compromise the integrity of the integrated learning management system. Users accessing the affected Joomdle extension through maliciously crafted links may unknowingly execute malicious javascript code that can steal authentication tokens, modify page content, or redirect users to phishing sites. The attack vector is particularly dangerous because it requires minimal user interaction beyond visiting a compromised link, making it an effective method for large-scale exploitation within educational institutions that rely on Joomdle for Moodle integration.
Security professionals should recognize this vulnerability as aligning with ATT&CK technique T1566.001 which covers "Phishing: Spearphishing Attachment" and T1566.002 covering "Phishing: Spearphishing Link", since the reflected XSS can be delivered through malicious links that appear legitimate to users. Organizations using Joomdle versions below 3.1.1 should immediately implement mitigations including updating to the patched version, implementing input validation for all endpoint parameters, and deploying web application firewalls with XSS detection capabilities. The remediation strategy should also include user education regarding suspicious link behavior and regular security audits of third-party Joomla extensions to prevent similar vulnerabilities from being introduced into the system architecture.
Additional protective measures include implementing Content Security Policy headers that restrict script execution, conducting thorough input validation across all user-supplied parameters, and establishing proper output encoding for dynamic content. The vulnerability demonstrates the critical importance of validating all inputs in web applications and highlights the need for comprehensive security testing of third-party extensions that integrate with core CMS platforms like Joomla. Organizations should also consider implementing automated monitoring systems to detect unusual traffic patterns or potential exploitation attempts targeting known vulnerabilities in their web application stack.