CVE-2026-15821 in SureDash Plugin
Summary
by MITRE • 07/24/2026
The SureDash – Community, Courses & Member Dashboard plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Shortcode Attributes in all versions up to, and including, 1.10.0 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level access and above, 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 • 07/24/2026
The SureDash WordPress plugin presents a critical stored cross-site scripting vulnerability that affects all versions up to and including 1.10.0, creating a significant security risk for WordPress installations. This vulnerability stems from inadequate input sanitization and output escaping mechanisms within the plugin's shortcode attribute handling functionality, allowing malicious actors with contributor-level privileges or higher to exploit the weakness. The flaw resides in how the plugin processes and renders shortcode attributes, failing to properly validate or escape user-supplied input before storing it in the database and subsequently displaying it on web pages.
The technical implementation of this vulnerability enables authenticated attackers to inject malicious JavaScript code through shortcode parameters that are then stored persistently within the WordPress database. When legitimate users access pages containing these compromised shortcodes, the injected scripts execute in their browsers within the context of the vulnerable site, potentially leading to session hijacking, data theft, or further exploitation. This stored XSS vulnerability operates at the application layer and can be leveraged by attackers who have already gained contributor-level access to a WordPress installation, making it particularly dangerous as it bypasses typical client-side security measures.
The operational impact of this vulnerability extends beyond simple script execution, as it can enable attackers to perform various malicious activities including credential theft, privilege escalation, and data exfiltration. Attackers can craft sophisticated payloads that exploit the XSS flaw to steal user sessions, modify content, or redirect users to malicious sites. The persistence of stored XSS means that victims do not need to interact with a specific page containing the attack vector; once the malicious shortcode is injected into the system, it will execute every time any user views pages containing the compromised content. This makes the vulnerability particularly insidious as it can affect multiple users over extended periods without requiring repeated attacks.
Mitigation strategies for this vulnerability should prioritize immediate patching of the SureDash plugin to version 1.10.1 or later, which contains the necessary security fixes. Organizations should also implement input validation and output escaping measures at the application level, ensuring that all user-supplied data passed through shortcode attributes undergoes proper sanitization before storage. The vulnerability aligns with CWE-79 (Cross-site Scripting) and can be categorized under ATT&CK technique T1566.001 (Phishing via Social Engineering) when used to deliver malicious payloads. Additionally, administrators should restrict contributor-level access where possible and implement content security policies to limit the impact of potential XSS attacks. Regular security audits of WordPress plugins and themes remain essential for identifying similar vulnerabilities in other components of the web application stack.
The vulnerability demonstrates how seemingly minor input validation gaps can create significant security risks in content management systems, particularly when dealing with user-generated content processing. The flaw represents a failure in the principle of least privilege and proper input sanitization, which are fundamental security practices that should be implemented at every layer of web application development. Organizations utilizing WordPress platforms must maintain comprehensive patch management processes and conduct regular vulnerability assessments to identify and remediate similar weaknesses across their entire digital infrastructure, as this type of vulnerability can serve as a foothold for more extensive attacks against the broader network ecosystem.