CVE-2026-4077 in Ecover Builder for Dummies Plugin
Summary
by MITRE • 03/21/2026
The Ecover Builder For Dummies plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'id' parameter of the 'ecover' shortcode in all versions up to and including 1.0. This is due to insufficient input sanitization and output escaping on the user-supplied 'id' shortcode attribute. 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.
Be aware that VulDB is the high quality source for vulnerability data.
Analysis
by VulDB Data Team • 03/21/2026
The vulnerability identified as CVE-2026-4077 affects the Ecover Builder For Dummies WordPress plugin, presenting a critical stored cross-site scripting flaw that compromises web application security. This vulnerability exists within the plugin's shortcode handling mechanism, specifically targeting the 'id' parameter of the 'ecover' shortcode functionality. The issue impacts all versions of the plugin up to and including version 1.0, making it a widespread concern for WordPress installations that utilize this particular plugin. The vulnerability stems from inadequate input sanitization and insufficient output escaping mechanisms that fail to properly validate or sanitize user-supplied data before processing.
The technical exploitation of this vulnerability occurs through the manipulation of the 'id' shortcode attribute, which allows authenticated attackers with Contributor-level permissions or higher to inject malicious scripts into the plugin's processing pipeline. When the vulnerable shortcode is processed and rendered on web pages, the injected scripts execute in the context of the victim's browser, creating a persistent cross-site scripting attack vector. The stored nature of this vulnerability means that the malicious code is saved within the application's database and will execute whenever any user accesses a page containing the injected content, making the attack particularly dangerous as it can affect multiple users over time. This flaw directly aligns with CWE-79, which categorizes cross-site scripting vulnerabilities as a critical web application security weakness.
The operational impact of CVE-2026-4077 extends beyond simple script execution, as it provides attackers with significant privileges within the compromised WordPress environment. With Contributor-level access, attackers can leverage this vulnerability to perform various malicious activities including session hijacking, data theft, privilege escalation, and potential full system compromise. The vulnerability's accessibility to users with relatively low privileges makes it particularly concerning for WordPress sites where multiple users have contributor access or higher, as these roles typically have the ability to create and modify content. Attackers could potentially use this vulnerability to inject scripts that redirect users to malicious sites, steal cookies and session data, or even deploy additional malware payloads. The stored nature of the vulnerability means that the attack persists even after the initial injection, creating a long-term security risk that can affect users for extended periods.
Mitigation strategies for CVE-2026-4077 should prioritize immediate plugin updates to the latest available version that contains proper input sanitization and output escaping mechanisms. System administrators should implement comprehensive input validation that filters and escapes all user-supplied data before processing, particularly focusing on the 'id' parameter of the affected shortcode. The implementation of Content Security Policy headers can provide additional protection against script execution, while regular security audits should be conducted to identify similar vulnerabilities in other plugins or themes. Organizations should also consider implementing network monitoring to detect suspicious script injection patterns and establish robust access control measures to limit the privileges of users with contributor-level access. According to ATT&CK framework, this vulnerability maps to T1059.007 for script execution and T1546.001 for credential access, highlighting the multi-faceted attack surface that this vulnerability creates for threat actors. The remediation process should include thorough testing of the updated plugin to ensure that all functionality remains intact while eliminating the security flaw that allowed the cross-site scripting attack vector to exist.