CVE-2025-31027: Jocoxdesign Tiger XSS Vulnerability

CVE-2025-31027 Overview

CVE-2025-31027 is a reflected Cross-Site Scripting (XSS) vulnerability in the jocoxdesign Tiger WordPress theme. The flaw affects all versions of Tiger up to and including 2.0. The theme fails to properly neutralize user-supplied input during web page generation, allowing attackers to inject arbitrary JavaScript that executes in a victim's browser. The vulnerability is classified under CWE-79 and requires user interaction, typically by clicking a crafted link. Exploitation can lead to session theft, credential harvesting, and unauthorized actions performed under the victim's WordPress session.

Critical Impact

Attackers can execute arbitrary JavaScript in the context of a WordPress site running Tiger theme versions through 2.0, enabling session hijacking and phishing against site administrators.

Affected Products

• jocoxdesign Tiger WordPress theme, all versions up to and including 2.0
• WordPress installations using the Tiger theme without applied mitigations
• Sites with authenticated administrator sessions exposed to crafted URLs

Discovery Timeline

• 2025-05-19 - CVE-2025-31027 published to the National Vulnerability Database
• 2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-31027

Vulnerability Analysis

The Tiger theme processes request parameters and reflects them into rendered HTML without adequate output encoding or input sanitization. When a user follows a crafted URL containing malicious payload data, the theme echoes the attacker-controlled input directly into the response page. The browser then parses the injected content as executable script within the site's origin.

Because the payload executes under the WordPress site's domain, it inherits access to same-origin cookies, session tokens, and DOM content. An attacker can pivot from reflected XSS to administrative account takeover if the victim holds elevated privileges. The scope-changed nature of the flaw means impact extends beyond the vulnerable component to affect the wider WordPress environment.

Root Cause

The root cause is improper neutralization of input during web page generation, mapped to [CWE-79]. The theme's PHP templates output request data (query strings, form fields, or referer values) without applying WordPress escaping functions such as esc_html(), esc_attr(), or esc_url(). This allows raw HTML and <script> tags to survive into the rendered response.

Attack Vector

Exploitation proceeds over the network without authentication but requires user interaction. An attacker crafts a URL targeting the vulnerable Tiger theme endpoint with a JavaScript payload appended to a reflected parameter. The attacker delivers the link through phishing email, social media, or a malicious page. When a victim, particularly a logged-in WordPress administrator, clicks the link, the payload executes in their browser session against the WordPress origin. See the Patchstack WordPress Vulnerability Report for technical details on the reflected parameter and payload structure.

Detection Methods for CVE-2025-31027

Indicators of Compromise

• Web server access logs containing URL parameters with <script>, javascript:, onerror=, or URL-encoded equivalents (%3Cscript%3E) targeting Tiger theme paths
• Referer headers from unexpected external domains preceding administrative actions in WordPress logs
• Unexpected outbound requests from browsers of authenticated WordPress users to attacker-controlled hosts
• New administrator accounts or modified user roles created shortly after clicks on suspicious inbound links

Detection Strategies

• Deploy Web Application Firewall (WAF) rules that flag reflected script patterns in query strings targeting WordPress theme endpoints
• Inspect HTTP response bodies for user-controlled parameter values appearing unescaped inside HTML contexts
• Correlate authentication events with browser-originated requests carrying anomalous Referer or URL parameters

Monitoring Recommendations

• Enable verbose WordPress audit logging for user role changes, plugin installations, and administrator logins
• Monitor edge proxy or CDN logs for traffic spikes to Tiger theme URLs containing suspicious query strings
• Alert on Content Security Policy (CSP) violation reports indicating inline script execution attempts

How to Mitigate CVE-2025-31027

Immediate Actions Required

• Identify all WordPress instances running the jocoxdesign Tiger theme at version 2.0 or earlier
• Deactivate and replace the Tiger theme until a patched release is confirmed available from the vendor
• Force password resets and invalidate active sessions for WordPress administrator accounts
• Enable a strict Content Security Policy that blocks inline scripts and untrusted script sources

Patch Information

At the time of publication, no fixed version has been published beyond Tiger 2.0. Review the Patchstack WordPress Vulnerability Report for vendor status updates. Site owners should subscribe to WordPress theme security feeds and apply any subsequent patched release immediately upon availability.

Workarounds

• Replace the Tiger theme with a maintained alternative until the vendor issues a fix
• Deploy WAF rules to block requests containing script tags or JavaScript event handlers in query parameters
• Restrict WordPress administrative access by IP allowlist to limit exposure of privileged sessions to crafted links
• Train administrators to avoid clicking untrusted links while logged into WordPress

# Example WAF rule (ModSecurity) blocking reflected XSS payloads
SecRule ARGS "@rx (?i)(<script|javascript:|onerror=|onload=)" \
  "id:1003102,phase:2,deny,status:403,\
   msg:'Reflected XSS attempt against Tiger theme (CVE-2025-31027)'"