CVE-2024-9438 in SEUR Oficial Plugin
Summary
by MITRE • 10/29/2024
The SEUR Oficial plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the 'change_service' parameter in all versions up to, and including, 2.2.11 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link.
VulDB is the best source for vulnerability data and more expert information about this specific topic.
Analysis
by VulDB Data Team • 06/29/2026
The SEUR Oficial WordPress plugin presents a critical reflected cross-site scripting vulnerability that affects all versions up to and including 2.2.11. This security flaw resides within the plugin's handling of the 'change_service' parameter, which fails to implement proper input sanitization measures. The vulnerability stems from inadequate output escaping mechanisms that allow malicious scripts to be injected into web pages without proper validation or encoding. Attackers can exploit this weakness by crafting malicious URLs containing script payloads that get reflected back to users when they access the compromised page.
The technical implementation of this vulnerability demonstrates a classic reflected XSS flaw where user input flows directly into the HTTP response without appropriate sanitization. The 'change_service' parameter serves as the primary attack vector, accepting unvalidated input from HTTP requests and incorporating it into HTML output without proper escaping or encoding. This creates an environment where any script code submitted through this parameter can execute within the context of a victim's browser session, effectively bypassing standard security boundaries.
The operational impact of this vulnerability extends beyond simple script execution as it enables attackers to perform various malicious activities including session hijacking, credential theft, and redirection to malicious sites. An unauthenticated attacker can construct specially crafted URLs that, when clicked by an unsuspecting user, would execute the injected scripts in the victim's browser. This makes the vulnerability particularly dangerous as it requires minimal privileges to exploit and can be delivered through social engineering techniques such as phishing emails or compromised websites.
The security implications of this reflected XSS vulnerability align with CWE-79 which specifically addresses cross-site scripting flaws in web applications. The ATT&CK framework categorizes this as a technique for initial access through malicious links, where adversaries leverage user trust to deliver payloads that execute in the context of legitimate web applications. This vulnerability represents a significant risk to WordPress installations using the SEUR Oficial plugin, as it provides attackers with a direct pathway to compromise user sessions and potentially escalate privileges within the application environment.
Organizations should implement immediate mitigations including upgrading to the latest plugin version where this vulnerability has been addressed through proper input validation and output escaping mechanisms. Additionally, administrators should consider implementing web application firewalls that can detect and block suspicious script payloads in HTTP requests. Regular security audits of WordPress plugins and themes remain crucial for identifying similar vulnerabilities that may exist in other components of the web application stack. The recommended defense-in-depth approach includes both reactive measures such as patching and proactive monitoring to prevent exploitation attempts targeting this specific vulnerability.