CVE-2025-67918: Woffice Reflected XSS Vulnerability

CVE-2025-67918 Overview

CVE-2025-67918 is a Reflected Cross-Site Scripting (XSS) vulnerability affecting the WofficeIO Woffice WordPress theme. This vulnerability arises from improper neutralization of user-supplied input during web page generation, allowing attackers to inject malicious scripts that execute in the context of a victim's browser session. Reflected XSS attacks typically require social engineering to trick users into clicking malicious links containing the payload.

Critical Impact

Attackers can exploit this vulnerability to execute arbitrary JavaScript in authenticated user sessions, potentially leading to session hijacking, credential theft, or unauthorized actions on behalf of the victim.

Affected Products

• WofficeIO Woffice WordPress Theme versions up to and including 5.4.30

Discovery Timeline

• 2026-01-08 - CVE-2025-67918 published to NVD
• 2026-01-08 - Last updated in NVD database

Technical Details for CVE-2025-67918

Vulnerability Analysis

This vulnerability is classified under CWE-79 (Improper Neutralization of Input During Web Page Generation). The Woffice WordPress theme fails to properly sanitize user-controlled input before reflecting it back in the rendered HTML response. This allows attackers to craft malicious URLs containing JavaScript payloads that execute when a victim visits the link.

The attack requires user interaction, as victims must click on a specially crafted link. Once executed, the malicious script runs within the security context of the vulnerable WordPress site, giving attackers access to session cookies, DOM content, and the ability to perform actions as the authenticated user.

Root Cause

The vulnerability stems from insufficient input validation and output encoding in the Woffice theme. When user-supplied data is incorporated into the page response without proper sanitization, HTML and JavaScript content can be injected and executed by the browser. The theme fails to implement adequate escaping mechanisms such as esc_html(), esc_attr(), or wp_kses() functions that WordPress provides for secure output handling.

Attack Vector

The attack is network-based and requires user interaction. An attacker constructs a malicious URL containing a JavaScript payload targeting a parameter vulnerable to reflection. The attacker then distributes this link through phishing emails, social media, or other channels. When a victim clicks the link while authenticated to the WordPress site, the injected script executes in their browser context.

The impact includes potential theft of session tokens, defacement of page content visible to the victim, redirection to malicious sites, and the ability to perform actions on behalf of the authenticated user within the WordPress installation.

Detection Methods for CVE-2025-67918

Indicators of Compromise

• Unusual URL patterns in web server logs containing JavaScript code fragments or encoded script tags in query parameters
• HTTP requests with suspicious parameter values containing <script>, javascript:, or event handlers like onerror, onload
• Browser console errors related to Content Security Policy violations if CSP is implemented
• User reports of unexpected behavior or redirects after clicking links to the WordPress site

Detection Strategies

• Implement Web Application Firewall (WAF) rules to detect and block requests containing XSS payload patterns
• Enable detailed web server access logging and monitor for suspicious query string patterns
• Deploy browser-based Content Security Policy headers to restrict inline script execution
• Use security scanning tools to identify reflected input in page responses

Monitoring Recommendations

• Review web server access logs for requests with encoded JavaScript or HTML entities in URL parameters
• Monitor for anomalous user session behavior that may indicate session hijacking
• Implement real-time alerting on WAF rule triggers related to XSS patterns
• Conduct periodic vulnerability scanning of WordPress installations to identify unpatched themes

How to Mitigate CVE-2025-67918

Immediate Actions Required

• Update the Woffice theme to a version newer than 5.4.30 once a patched release is available from WofficeIO
• Implement a Web Application Firewall with XSS protection rules as a compensating control
• Review and enable Content Security Policy headers to mitigate the impact of successful XSS attacks
• Educate users about phishing risks and the dangers of clicking untrusted links

Patch Information

Organizations should monitor the Patchstack WordPress Vulnerability Report for updates on patch availability. Contact WofficeIO directly for information regarding security updates for the Woffice theme. Until a patch is available, implement the recommended workarounds to reduce exposure.

Workarounds

• Deploy a Web Application Firewall with rules configured to block common XSS patterns in request parameters
• Implement strict Content Security Policy headers to prevent inline script execution and restrict script sources
• Consider temporarily disabling or restricting access to features of the Woffice theme that may be vulnerable
• Use browser security extensions that detect and block XSS attempts for administrative users

# Example Apache .htaccess configuration for basic XSS mitigation
# Add Content Security Policy header
Header set Content-Security-Policy "default-src 'self'; script-src 'self'; style-src 'self' 'unsafe-inline';"

# Add X-XSS-Protection header (legacy browsers)
Header set X-XSS-Protection "1; mode=block"

# Add X-Content-Type-Options header
Header set X-Content-Type-Options "nosniff"