CVE-2024-38671 in WP GoToWebinar Plugin
Summary
by MITRE • 07/20/2024
Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Martin Gibson WP GoToWebinar allows Stored XSS.This issue affects WP GoToWebinar: from n/a through 15.7.
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Analysis
by VulDB Data Team • 03/17/2025
This vulnerability represents a critical cross-site scripting weakness that enables attackers to inject malicious scripts into web pages viewed by other users. The flaw exists within the WP GoToWebinar plugin, specifically in how it processes and renders user input during web page generation. The vulnerability is classified as stored XSS because malicious payloads can be permanently stored on the server and subsequently executed whenever affected pages are accessed by unsuspecting users. This type of vulnerability falls under CWE-79 which defines improper neutralization of input during web page generation, making it particularly dangerous as it can persist across multiple user sessions and browser visits.
The technical implementation of this flaw occurs when the plugin fails to properly sanitize or escape user-supplied data before incorporating it into dynamically generated web content. Attackers can exploit this by submitting malicious scripts through input fields or parameters that are then stored in the plugin's database or configuration. When other users view pages that display this stored data, their browsers execute the injected scripts, potentially allowing attackers to steal session cookies, perform unauthorized actions on behalf of users, or redirect them to malicious sites. The vulnerability affects all versions of WP GoToWebinar from the initial release through version 15.7, indicating this flaw has been present for an extended period and likely affects numerous installations.
The operational impact of this vulnerability extends beyond simple script execution, as it can enable sophisticated attack vectors such as credential theft, session hijacking, and data exfiltration. Users who have administrative privileges on affected WordPress sites become particularly vulnerable, as attackers could leverage this weakness to gain full control over the site and potentially compromise the entire WordPress installation. The stored nature of the vulnerability means that once exploited, malicious code can affect multiple users over time without requiring repeated attacks against individual users. This makes the vulnerability particularly attractive to threat actors who seek persistent access to compromised systems and can lead to long-term security breaches that may go undetected for extended periods.
Organizations should immediately implement mitigations including updating to the latest version of the WP GoToWebinar plugin where the vulnerability has been patched. Additionally, administrators should review and implement proper input validation and output escaping mechanisms for all user-supplied data. The remediation process should include conducting thorough security assessments of all installed WordPress plugins to identify similar vulnerabilities. According to ATT&CK framework, this vulnerability maps to T1566.001 (Phishing: Spearphishing Attachment) and T1059.001 (Command and Scripting Interpreter: Visual Basic) as attackers may use this weakness to establish initial access or execute malicious commands. Network monitoring should be enhanced to detect unusual script execution patterns, and security teams should consider implementing content security policies to limit the impact of potential XSS attacks. Regular security audits and penetration testing should be conducted to identify and remediate similar vulnerabilities across the entire web application ecosystem.