CVE-2026-110510 in Essential Addons for Elementor Plugin
Summary
by MITRE • 10/23/2026
The Essential Addons for Elementor WordPress plugin before 6.8.7 does not validate the HTML tag setting of some of its widgets before using it to build markup, which could allow users with the author role and above to inject iframe and form elements into published pages.
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Analysis
by VulDB Data Team • 10/23/2026
The vulnerability identified in Essential Addons for Elementor prior to version 6.8.7 represents a significant security flaw rooted in insufficient input validation within the plugin's widget rendering logic. Specifically, the software fails to sanitize or validate HTML tag settings provided by users before incorporating them into the final page markup. This lack of rigorous checking allows malicious actors with author-level permissions and above to manipulate how content is structured on the front end. By exploiting this weakness, an attacker can inject arbitrary HTML elements, most notably iframe tags and form elements, directly into published pages without triggering standard security filters or sanitization routines that are typically expected in WordPress environments.
From a technical perspective, this flaw aligns with CWE-79, which categorizes issues related to Cross-Site Scripting (XSS) via improper input validation. The core issue lies in the application's trust model, where it assumes that inputs from users with elevated privileges are safe for direct inclusion in HTML output. In reality, even authenticated users can leverage this oversight to embed malicious scripts or external content containers. The injection of iframe elements is particularly dangerous as it allows the embedding of third-party web pages within the victim site, potentially leading to phishing attacks where users are tricked into entering credentials on a fake login page hosted externally but displayed seamlessly within the trusted domain. Similarly, injecting form elements can facilitate credential harvesting or unauthorized data submission if not properly secured with anti-CSRF tokens and validation checks that may be bypassed due to the context of injection.
The operational impact of this vulnerability extends beyond simple defacement or script execution. It undermines the integrity of the website by allowing untrusted content to appear as part of the legitimate site structure, which can severely damage user trust and brand reputation. Attackers with author privileges might use iframes to conduct clickjacking attacks, overlaying invisible elements over interactive components to trick users into performing unintended actions such as purchasing items or changing account settings. Furthermore, the ability to inject forms opens avenues for phishing campaigns where sensitive information like passwords or credit card details can be captured and exfiltrated to an attacker-controlled server. This is particularly concerning in multi-author environments where privilege escalation might occur if lower-level accounts are compromised and subsequently granted higher roles through social engineering or other vulnerabilities.
Mitigation strategies must focus on immediate remediation of the software version alongside enhanced input validation practices. The primary defense is upgrading Essential Addons for Elementor to version 6.8.7 or later, where these specific validation checks have been implemented by the developers. For organizations unable to upgrade immediately due to compatibility constraints with other plugins or custom code, implementing a Web Application Firewall (WAF) can provide temporary protection by filtering out requests containing suspicious iframe or form injection patterns before they reach the application logic. Additionally, administrators should enforce strict role-based access control policies, ensuring that only trusted individuals have author-level privileges and regularly auditing user accounts for any signs of compromise.
From an industry standard perspective, this vulnerability also relates to ATT&CK technique T1059, Command and Scripting Interpreter, if the injected content leads to further exploitation chains, although it is more directly mapped to web-based attacks like those described in CWE-74 (Improper Neutralization of Special Elements in Output Used by a Downstream Component). Security teams should treat this as a critical issue requiring prompt patching. Regular security assessments and penetration testing that include checks for improper input validation in WordPress plugins are essential to identify similar weaknesses before they can be exploited. Maintaining up-to-date software dependencies and adhering to secure coding standards such as OWASP Top 10 guidelines will significantly reduce the risk of such vulnerabilities persisting in production environments.