CVE-2024-49677: Bootstrap Buttons XSS Vulnerability

CVE-2024-49677 Overview

CVE-2024-49677 is a reflected Cross-Site Scripting (XSS) vulnerability in the David Cramer Bootstrap Buttons WordPress plugin. The flaw stems from improper neutralization of user-supplied input during web page generation [CWE-79]. Attackers can craft malicious URLs that execute arbitrary JavaScript in the victim's browser session when clicked. The vulnerability affects all versions of Bootstrap Buttons up to and including version 1.2. Successful exploitation requires user interaction, but the attack travels across security scopes, allowing scripts to affect resources beyond the vulnerable component. The issue was published to the National Vulnerability Database (NVD) on December 18, 2024.

Critical Impact

Attackers can execute arbitrary JavaScript in victims' browsers, leading to session hijacking, credential theft, and unauthorized actions performed under the victim's WordPress account.

Affected Products

• David Cramer Bootstrap Buttons WordPress plugin versions 1.2 and earlier
• WordPress sites with the bootstrap-buttons plugin installed and active
• Administrator and authenticated user sessions on affected WordPress installations

Discovery Timeline

• 2024-12-18 - CVE-2024-49677 published to NVD
• 2026-04-23 - Last updated in NVD database

Technical Details for CVE-2024-49677

Vulnerability Analysis

The vulnerability is a reflected XSS flaw classified under [CWE-79]: Improper Neutralization of Input During Web Page Generation. The Bootstrap Buttons plugin fails to sanitize or encode user-controlled input before reflecting it into HTTP responses. When a victim clicks a maliciously crafted link, the injected payload executes in the context of the WordPress site's origin.

Reflected XSS attacks require user interaction, typically delivered through phishing emails or malicious referrers. The scope change indicates that injected scripts can affect resources beyond the immediately vulnerable component, including parent frames, cookies scoped to the broader site, and browser storage.

Impact spans confidentiality, integrity, and availability at limited levels. An attacker can steal session cookies, modify rendered page content, inject malicious forms, or redirect users to attacker-controlled infrastructure.

Root Cause

The root cause is missing output encoding when the plugin renders user-supplied parameters back into HTML responses. Input arriving through query string parameters or form fields is concatenated directly into the response body without HTML entity encoding or context-aware escaping. WordPress provides sanitization helpers such as esc_html(), esc_attr(), and wp_kses(), but the affected code paths do not invoke them.

Attack Vector

The attack vector is network-based and requires user interaction. An attacker constructs a URL containing a JavaScript payload in a vulnerable parameter handled by the bootstrap-buttons plugin. The attacker delivers the link through email, social media, or a malicious website. When an authenticated WordPress user clicks the link, the server reflects the payload into the response, and the browser executes it under the trusted origin.

No authentication is required to craft the malicious URL, lowering the barrier to weaponization. Refer to the Patchstack WordPress Vulnerability Report for additional technical context.

Detection Methods for CVE-2024-49677

Indicators of Compromise

• HTTP request logs containing URL parameters with <script>, javascript:, onerror=, or onload= patterns targeting bootstrap-buttons plugin endpoints
• Unexpected outbound requests from administrator browsers to unfamiliar domains shortly after visiting WordPress admin pages
• New or modified WordPress administrator accounts created without authorized change records

Detection Strategies

• Inspect web server access logs for encoded XSS payloads such as %3Cscript%3E, %22%3E%3C, or base64-encoded JavaScript in query strings referencing the plugin
• Deploy a Web Application Firewall (WAF) with OWASP Core Rule Set signatures tuned for reflected XSS detection
• Monitor browser Content Security Policy (CSP) violation reports for blocked inline script execution on WordPress pages

Monitoring Recommendations

• Forward WordPress access and error logs to a centralized SIEM for correlation against known XSS attack patterns
• Alert on referrer headers pointing to external domains followed by administrative actions in WordPress audit logs
• Track plugin version inventory across WordPress fleets to identify hosts running bootstrap-buttons version 1.2 or earlier

How to Mitigate CVE-2024-49677

Immediate Actions Required

• Deactivate the Bootstrap Buttons plugin until a patched version is confirmed available from the vendor
• Audit WordPress administrator accounts for unauthorized changes and force password resets for privileged users
• Implement a strict Content Security Policy that blocks inline scripts and restricts script sources to trusted origins

Patch Information

No fixed version is identified in the available advisory data. The vulnerability affects Bootstrap Buttons through version 1.2. Administrators should monitor the Patchstack WordPress Vulnerability Report and the WordPress plugin repository for patch availability.

Workarounds

• Remove the bootstrap-buttons plugin directory from the WordPress installation if it is not business-critical
• Deploy a WAF rule that blocks requests containing script tags or JavaScript event handlers in parameters routed to the plugin
• Restrict WordPress administrative access by IP allow-listing to reduce exposure of privileged sessions to phishing-delivered XSS links

# Example WAF rule to block common reflected XSS payloads in query strings
# ModSecurity rule example
SecRule ARGS "@rx (?i)(<script|javascript:|onerror=|onload=)" \
    "id:1000049677,phase:2,deny,status:403,msg:'Potential reflected XSS targeting bootstrap-buttons'"