CVE-2024-51778 Overview
CVE-2024-51778 is a reflected Cross-Site Scripting (XSS) vulnerability affecting the Tevya Satisfaction Reports from Help Scout WordPress plugin (happiness-reports-for-help-scout). The flaw stems from improper neutralization of user-supplied input during web page generation [CWE-79]. Attackers can craft malicious URLs that, when followed by an authenticated or unauthenticated victim, execute arbitrary JavaScript in the victim's browser session. The vulnerability affects all plugin versions up to and including 2.0.3.
Critical Impact
Successful exploitation enables session hijacking, credential theft, and unauthorized actions performed in the context of the targeted WordPress user, with a scope change extending impact beyond the vulnerable component.
Affected Products
- Tevya Satisfaction Reports from Help Scout (plugin slug: happiness-reports-for-help-scout)
- All versions from initial release through 2.0.3
- WordPress sites running the vulnerable plugin
Discovery Timeline
- 2024-11-09 - CVE-2024-51778 published to NVD
- 2026-04-23 - Last updated in NVD database
Technical Details for CVE-2024-51778
Vulnerability Analysis
The vulnerability is a reflected XSS issue [CWE-79] in the Satisfaction Reports from Help Scout WordPress plugin. The plugin fails to sanitize or encode user-controlled input before reflecting it back in HTTP responses. An attacker crafts a URL containing JavaScript payloads in vulnerable parameters and delivers the link through phishing, social engineering, or malicious advertising.
When a victim clicks the link, the server reflects the unsanitized payload directly into the rendered page. The browser then executes the injected script under the origin of the affected WordPress site. Because the issue carries a scope change, code executing in the victim's browser can access resources protected by the same-origin policy of the target site.
Root Cause
The root cause is missing or insufficient output encoding of request parameters before they are written into HTML responses. The plugin does not apply WordPress sanitization functions such as esc_html(), esc_attr(), or wp_kses() to user-supplied data prior to inclusion in the response body.
Attack Vector
The attack vector is network-based and requires user interaction. An attacker constructs a URL targeting a vulnerable plugin endpoint with a JavaScript payload embedded in a reflected parameter. The victim must follow the link while browsing the affected WordPress site. Once triggered, the payload can exfiltrate cookies, perform actions as the logged-in administrator, or pivot to additional CSRF-based attacks. No prior authentication is required of the attacker to craft the payload.
No verified public proof-of-concept code is available for this vulnerability. See the Patchstack WordPress Vulnerability Advisory for technical details.
Detection Methods for CVE-2024-51778
Indicators of Compromise
- HTTP requests to WordPress endpoints containing URL-encoded <script>, javascript:, onerror=, or onload= payloads targeting plugin parameters.
- Referer headers from external phishing domains directing users into the plugin's request paths.
- Unexpected administrator activity, such as new user creation or plugin installation, following user clicks on suspicious links.
Detection Strategies
- Inspect web server access logs for query strings containing HTML or JavaScript metacharacters reflected back in responses.
- Deploy a Web Application Firewall (WAF) with rules tuned to detect reflected XSS patterns targeting WordPress plugin paths.
- Correlate browser-side Content Security Policy (CSP) violation reports with server-side request logs to identify exploitation attempts.
Monitoring Recommendations
- Monitor WordPress audit logs for changes to user accounts, options, or plugin states immediately following anomalous outbound clicks.
- Track outbound DNS and HTTP traffic from administrator browsers for connections to attacker-controlled exfiltration endpoints.
- Alert on installations of the happiness-reports-for-help-scout plugin at version 2.0.3 or earlier across managed WordPress sites.
How to Mitigate CVE-2024-51778
Immediate Actions Required
- Identify all WordPress sites running the Satisfaction Reports from Help Scout plugin and verify the installed version.
- Disable or uninstall the plugin on any site running version 2.0.3 or earlier until a patched release is verified.
- Force a password reset and session invalidation for WordPress administrators who may have followed suspicious links.
Patch Information
At the time of NVD publication, the advisory lists affected versions through <= 2.0.3 without confirming a fixed release. Review the Patchstack WordPress Vulnerability Advisory for current patch availability and update to the vendor-supplied fixed version when released.
Workarounds
- Remove or deactivate the plugin until a verified patch is available from the vendor.
- Deploy WAF rules that block requests containing reflected XSS payloads against plugin endpoints.
- Implement a strict Content Security Policy on the WordPress site to restrict inline script execution and limit script sources.
- Restrict administrative access to trusted IP ranges and require multi-factor authentication for all privileged WordPress accounts.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
