CVE-2025-71177: Lavalite CMS Stored XSS Vulnerability

CVE-2025-71177 Overview

LavaLite CMS versions up to and including 10.1.0 contain a stored cross-site scripting (XSS) vulnerability in the package creation and search functionality. Authenticated users can inject crafted HTML or JavaScript code through the package Name or Description fields. This malicious content is stored in the application database and subsequently rendered without proper output encoding when other users view search results containing the compromised package. When victims browse search results that include the malicious package, the injected script executes in their browser context.

Critical Impact

Successful exploitation enables attackers to hijack user sessions, steal credentials, and perform unauthorized actions within the victim's authenticated session context. This stored XSS vulnerability is particularly dangerous because the malicious payload persists and can affect multiple users over time.

Affected Products

• LavaLite CMS versions up to and including 10.1.0
• All installations with package creation functionality enabled
• Systems where users have permissions to create or edit packages

Discovery Timeline

• 2026-01-23 - CVE-2025-71177 published to NVD
• 2026-01-29 - Last updated in NVD database

Technical Details for CVE-2025-71177

Vulnerability Analysis

This stored XSS vulnerability (CWE-79) exists because LavaLite CMS fails to properly sanitize and encode user-supplied input in the package creation workflow. When an authenticated user creates or modifies a package, the Name and Description fields accept arbitrary content including HTML tags and JavaScript code. The application stores this unsanitized content directly in the database.

The vulnerability becomes exploitable when the search functionality retrieves and displays package information. The stored malicious content is rendered in the browser without proper output encoding or Content Security Policy protections, causing the injected scripts to execute in the context of any user viewing the affected search results.

Root Cause

The root cause is insufficient input validation and output encoding in the package management module. Specifically:

1. Input Validation Failure: The package creation form does not strip or reject HTML and JavaScript content from the Name and Description fields before storing them in the database.

2. Output Encoding Failure: When rendering search results, the application outputs the stored package data directly into the HTML document without applying proper encoding (such as HTML entity encoding) to neutralize potentially malicious content.

3. Missing Content Security Policy: The application appears to lack adequate CSP headers that would mitigate the impact of XSS by restricting inline script execution.

Attack Vector

The attack requires network access and a low-privilege authenticated account with permissions to create packages. The attack proceeds as follows:

1. An attacker with valid credentials logs into the LavaLite CMS administrative interface
2. The attacker navigates to the package creation functionality
3. In the Name or Description field, the attacker enters a malicious payload containing JavaScript code designed to exfiltrate session tokens or perform actions on behalf of victims
4. The attacker saves the package, storing the malicious payload in the database
5. When other authenticated users (including administrators) search for packages and the malicious package appears in results, the injected script executes in their browsers
6. The script can then steal session cookies, capture credentials, redirect users to phishing pages, or perform administrative actions using the victim's session

The attack is particularly effective because users searching for packages have no indication that viewing search results will execute malicious code, and the payload persists until the malicious package is removed.

Detection Methods for CVE-2025-71177

Indicators of Compromise

• Unusual JavaScript or HTML tags present in package Name or Description fields in the database
• Package entries containing <script> tags, event handlers (e.g., onerror, onclick), or encoded JavaScript
• Unexpected outbound network requests from client browsers when viewing package search results
• User reports of unexpected behavior or redirects when browsing package listings

Detection Strategies

• Implement database auditing to monitor for suspicious content insertion in package-related tables
• Deploy Web Application Firewall (WAF) rules to detect and log XSS payload patterns in POST requests to package creation endpoints
• Enable browser-side monitoring or Content Security Policy violation reporting to detect inline script execution attempts
• Review application logs for unusual package creation activity or patterns indicative of payload injection

Monitoring Recommendations

• Monitor for CSP violation reports if Content Security Policy headers are implemented
• Track package creation and modification events with full content logging for forensic analysis
• Implement real-time alerting for database entries containing known XSS patterns
• Regularly audit package content for HTML or JavaScript code that should not be present in legitimate entries

How to Mitigate CVE-2025-71177

Immediate Actions Required

• Review all existing packages in the database for malicious content and remove or sanitize any identified payloads
• Implement strict input validation to reject or strip HTML and JavaScript from package Name and Description fields
• Apply proper output encoding (HTML entity encoding) when rendering package data in search results and other views
• Deploy Content Security Policy headers to restrict inline script execution and mitigate XSS impact

Patch Information

At the time of this writing, users should monitor the GitHub Issue #420 for vendor response and official patch availability. Additionally, check the LavaLite Official Website for security advisories and updated releases. The VulnCheck Advisory provides additional technical details about this vulnerability.

Until an official patch is released, organizations should implement the workarounds described below to reduce exposure.

Workarounds

• Restrict package creation permissions to only trusted administrative users until a patch is available
• Implement server-side input sanitization using a library that strips all HTML tags from package fields
• Add Content Security Policy headers to prevent inline script execution: Content-Security-Policy: default-src 'self'; script-src 'self'
• Consider temporarily disabling package creation functionality if it is not critical to operations
• Deploy a WAF rule to block requests containing XSS patterns in package-related POST parameters

# Example nginx Content Security Policy configuration
add_header Content-Security-Policy "default-src 'self'; script-src 'self'; object-src 'none'; base-uri 'self';" always;