CVE-2025-48313: Tripadvisor Shortcode Plugin XSS Vulnerability

CVE-2025-48313 Overview

CVE-2025-48313 is a stored cross-site scripting (XSS) vulnerability in the Tripadvisor Shortcode WordPress plugin developed by kevin heath. The flaw affects all plugin versions up to and including 2.2. It stems from improper neutralization of user-supplied input during web page generation, classified under [CWE-79]. An attacker with high privileges can inject malicious script content that executes in the browsers of users who view the affected pages. Because the payload persists in the site, every subsequent visitor becomes a potential target until the content is removed.

Critical Impact
Stored XSS in the Tripadvisor Shortcode plugin allows an authenticated attacker to persist JavaScript payloads that execute in visitors' browsers, enabling session theft, credential capture, and content manipulation.

Affected Products

Tripadvisor Shortcode WordPress plugin (tripadvisor-shortcode)
All versions from initial release through 2.2
WordPress sites running the vulnerable plugin

Discovery Timeline

2025-08-28 - CVE-2025-48313 published to the National Vulnerability Database
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-48313

Vulnerability Analysis

The vulnerability is a stored XSS flaw in the Tripadvisor Shortcode plugin for WordPress. The plugin fails to properly sanitize or encode input passed through its shortcode attributes before rendering the content in HTML output. An authenticated attacker with high privileges can supply crafted input containing HTML and JavaScript. The plugin stores this input and later injects it into rendered pages without adequate neutralization.

Exploitation requires user interaction, meaning a victim must visit a page that renders the malicious shortcode. Because the scope is changed, the injected script can affect resources beyond the vulnerable component's security context. The resulting execution occurs in the origin of the WordPress site, granting the attacker access to cookies, session tokens, and Document Object Model (DOM) content available to that origin.

Root Cause

The root cause is missing output encoding and input sanitization in the shortcode rendering logic. User-controlled attribute values are concatenated into HTML output without escaping angle brackets, quotes, or event-handler attributes. This aligns with [CWE-79], Improper Neutralization of Input During Web Page Generation.

Attack Vector

An authenticated administrator or editor inserts a shortcode containing a crafted attribute payload into a post or page. When any visitor loads the rendered page, the browser parses the unescaped markup and executes the injected script. The attacker can use this primitive to hijack sessions, redirect users, steal form data, or perform actions on behalf of the victim through Cross-Site Request Forgery (CSRF) chains.

No public proof-of-concept exploit or exploitation activity has been reported for this vulnerability. See the Patchstack Vulnerability Report for further technical detail.

Detection Methods for CVE-2025-48313

Indicators of Compromise

Unexpected <script> tags, on* event handlers, or javascript: URIs stored in WordPress post content or postmeta records referencing the Tripadvisor shortcode
Outbound browser requests from visitors to unfamiliar domains originating from pages rendering the plugin's shortcode
Unauthorized changes to administrator sessions or unexpected logins following visits to affected pages

Detection Strategies

Audit the wp_posts and wp_postmeta tables for shortcode instances containing HTML control characters, script tags, or encoded payloads
Review web server access logs for anomalous requests to admin endpoints originating from authenticated user sessions after content updates
Implement Content Security Policy (CSP) monitoring to flag inline script execution violations on pages using the plugin

Monitoring Recommendations

Enable file integrity monitoring on the WordPress wp-content/plugins/tripadvisor-shortcode directory
Log and review all shortcode edits performed by editor and administrator accounts
Alert on suspicious cookie exfiltration patterns or DOM-based redirects reported by browser telemetry

How to Mitigate CVE-2025-48313

Immediate Actions Required

Deactivate the Tripadvisor Shortcode plugin until an updated release resolves the issue
Audit existing posts and pages for shortcode instances containing unexpected HTML or script content and remove them
Restrict administrator and editor account access to trusted personnel and enforce multi-factor authentication

Patch Information

No vendor patch is currently identified in the NVD data. The vulnerability affects all versions through 2.2. Consult the Patchstack Vulnerability Report for the latest remediation guidance and to verify whether a fixed release is available.

Workarounds

Remove or replace the Tripadvisor Shortcode plugin with a maintained alternative that properly sanitizes shortcode attributes
Deploy a Web Application Firewall (WAF) rule to block requests containing script tags or event-handler attributes destined for shortcode-editing endpoints
Enforce a strict Content Security Policy that disallows inline scripts and restricts external script sources to trusted origins

bash

# Configuration example: disable the plugin via WP-CLI
wp plugin deactivate tripadvisor-shortcode
wp plugin delete tripadvisor-shortcode

# Example CSP header to mitigate stored XSS impact
# Add to your web server or WordPress security plugin configuration
Content-Security-Policy: default-src 'self'; script-src 'self'; object-src 'none'; base-uri 'self'