CVE-2022-3933 in Essential Real Estate Plugin
Summary
by MITRE • 12/12/2022
The Essential Real Estate WordPress plugin before 3.9.6 does not sanitize and escapes some parameters, which could allow users with a role as low as Admin to perform Cross-Site Scripting attacks.
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Analysis
by VulDB Data Team • 01/07/2023
The Essential Real Estate WordPress plugin vulnerability CVE-2022-3933 represents a critical security flaw that undermines the integrity of web applications built on the WordPress platform. This vulnerability specifically affects versions prior to 3.9.6 and demonstrates a classic failure in input validation and output sanitization practices that are fundamental to preventing cross-site scripting attacks. The flaw exists within the plugin's handling of user-supplied parameters, which are not properly sanitized or escaped before being rendered in web pages, creating an exploitable vector for malicious actors.
The technical implementation of this vulnerability stems from inadequate parameter validation within the plugin's codebase, where user inputs are directly incorporated into HTML output without proper sanitization measures. This type of vulnerability aligns with CWE-79, which categorizes cross-site scripting as a weakness that occurs when an application includes untrusted data in a new web page without proper validation or escaping. The vulnerability's exploitation requires minimal privilege levels, as users with administrative roles can leverage this flaw to inject malicious scripts that will execute in the context of other users' browsers. This characteristic significantly amplifies the potential impact, as administrators often possess elevated privileges and access to sensitive data within the WordPress ecosystem.
The operational impact of CVE-2022-3933 extends beyond simple script injection, potentially allowing attackers to perform session hijacking, steal sensitive information, redirect users to malicious websites, or even execute arbitrary code within the affected environment. From an attacker's perspective, this vulnerability fits into the ATT&CK framework under the T1059.007 technique, which involves the execution of scripts through web applications, and T1566, which encompasses social engineering tactics that exploit web application vulnerabilities. The vulnerability's presence in a real estate plugin suggests that it could compromise property listings, user data, and potentially financial information, making it particularly dangerous for businesses relying on such platforms for their core operations.
Organizations affected by this vulnerability should immediately implement mitigation strategies including updating to the patched version 3.9.6 or later, which addresses the sanitization issues through proper input validation and output escaping mechanisms. Additionally, security administrators should conduct thorough audits of their WordPress installations to identify other potentially vulnerable plugins and themes that may exhibit similar sanitization failures. The remediation process should include implementing proper content security policies, monitoring for suspicious user activities, and establishing robust input validation procedures that align with industry best practices for preventing XSS vulnerabilities. Regular security assessments and vulnerability scanning should become routine practices to identify and address similar issues before they can be exploited by malicious actors in the wild.