CVE-2012-2572 in ThreeWP Email Reflector
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in the ThreeWP Email Reflector plugin before 1.16 for WordPress allows remote attackers to inject arbitrary web script or HTML via the Subject of an email.
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Analysis
by VulDB Data Team • 06/22/2025
The CVE-2012-2572 vulnerability represents a critical cross-site scripting flaw in the ThreeWP Email Reflector WordPress plugin, which affected versions prior to 1.16. This vulnerability specifically targets the plugin's handling of email subject lines, creating a pathway for remote attackers to execute malicious web scripts within the context of affected WordPress installations. The flaw resides in the plugin's insufficient input validation and output encoding mechanisms, allowing attackers to inject arbitrary HTML and JavaScript code through email subject fields that are subsequently displayed to users.
The technical exploitation of this vulnerability occurs when an attacker sends an email containing malicious script within the subject line to a WordPress site utilizing the ThreeWP Email Reflector plugin. When the WordPress administrator or other users view the email in the plugin's interface, the malicious code executes in their browser context, potentially leading to session hijacking, credential theft, or redirection to malicious sites. This represents a classic stored cross-site scripting vulnerability where the malicious input is permanently stored and executed upon subsequent page views. The vulnerability aligns with CWE-79, which specifically addresses cross-site scripting flaws, and demonstrates the common pattern of insufficient input sanitization in web applications.
The operational impact of CVE-2012-2572 extends beyond simple script execution, as it can enable attackers to perform sophisticated attacks against WordPress administrators and users. Successful exploitation could lead to complete compromise of the WordPress installation, allowing attackers to modify content, create new administrator accounts, or exfiltrate sensitive data. The vulnerability is particularly dangerous in environments where administrators regularly check email notifications through the plugin interface, as each visit to the affected page could serve as an execution vector for the malicious payload. This attack vector falls under the ATT&CK technique T1566.001 for Phishing and T1059.007 for Command and Scripting Interpreter, demonstrating how XSS vulnerabilities can serve as initial access points for broader compromise.
Mitigation strategies for CVE-2012-2572 should prioritize immediate plugin updates to version 1.16 or later, which contain proper input validation and output encoding fixes. Organizations should also implement comprehensive input sanitization measures, including the use of HTML entity encoding for all user-supplied content displayed in web interfaces. Network-based protections such as web application firewalls can provide additional defense-in-depth, though they should not be relied upon as the sole mitigation. Regular security audits of WordPress plugins and themes remain essential, as this vulnerability demonstrates the ongoing risk posed by outdated or poorly maintained third-party components. The remediation process should include thorough testing of the updated plugin to ensure compatibility with existing workflows while maintaining security posture against similar vulnerabilities.