CVE-2026-73361 in Recipe Card Blocks for Gutenberg Plugin
Summary
by MITRE • 08/18/2026
Unauthenticated Cross Site Scripting (XSS) in Recipe Card Blocks for Gutenberg & Elementor <= 3.4.18 versions.
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Analysis
by VulDB Data Team • 08/18/2026
The vulnerability identified as an unauthenticated cross-site scripting flaw within the Recipe Card blocks for both Gutenberg and Elementor plugins, affecting versions up to 3.4.18, represents a significant security risk in WordPress-based content management systems. This specific weakness stems from insufficient input validation and output encoding mechanisms when processing user-supplied data that is subsequently rendered on web pages without proper sanitization. The core technical flaw lies in the application's failure to adequately escape special characters within recipe-related fields such as ingredient lists, instructions, or metadata before they are injected into the HTML context of a webpage. This allows an attacker to inject malicious JavaScript code that executes in the browser sessions of unsuspecting users who view the compromised content.
From a technical perspective, this vulnerability is classified under CWE-79, which denotes Improper Neutralization of Input During Web Page Generation commonly known as Cross-site Scripting. The attack vector is particularly dangerous because it requires no authentication, meaning any internet user can exploit it by creating or modifying public-facing recipe posts that contain the malicious payload. When another user loads this page, their browser interprets the injected script as legitimate content from the trusted domain of the WordPress site. This bypasses same-origin policy protections and allows the attacker to execute arbitrary JavaScript in the context of the victim's session with the privileges associated with that site.
The operational impact of such an unauthenticated XSS vulnerability is severe and multifaceted. Attackers can steal sensitive information such as administrative cookies, session tokens, or authentication credentials stored in local storage if they are accessible via script execution. This capability facilitates account takeover attacks where the attacker gains full control over user accounts, including those with elevated privileges like administrators. Furthermore, the malicious code can be used to deface websites by altering displayed content, redirect users to phishing sites designed to harvest additional credentials, or deploy malware through drive-by download techniques if combined with other browser vulnerabilities. In enterprise environments using WordPress for internal documentation or public-facing marketing materials, this could lead to data exfiltration and reputational damage.
This vulnerability aligns with the MITRE ATT&CK framework technique T1059.007, which refers to JavaScript execution within web browsers as part of initial access or persistence strategies. The lack of authentication required for exploitation places it in a high-risk category according to common scoring systems because it lowers the barrier to entry significantly compared to authenticated vulnerabilities. It also relates to CWE-20 Improper Input Validation since the root cause is the system's inability to correctly filter out dangerous script tags and event handlers from user input before rendering them into the DOM structure of the webpage.
Mitigation strategies must focus on immediate remediation through software updates as well as broader security hardening practices. The primary defense is to upgrade both the Gutenberg editor plugin and Elementor page builder to versions newer than 3.4.18 where these specific sanitization issues have been addressed by the developers. Until patches are applied, administrators should consider disabling user registration if not strictly necessary or restricting who can publish content that includes rich text fields prone to this flaw. Implementing a Web Application Firewall with rules specifically tuned to detect and block XSS payloads in POST requests related to recipe blocks can provide an additional layer of defense. Additionally, enforcing strict Content Security Policy headers on the web server helps mitigate the impact by preventing unauthorized script execution even if some malicious code manages to be injected into the page source. Regular security audits and penetration testing focused on input validation across all user-facing forms are essential for maintaining long-term resilience against such injection-based attacks.