CVE-2025-2775: SysAid On-Prem XXE Vulnerability

CVE-2025-2775 Overview

SysAid On-Prem versions <= 23.3.40 are vulnerable to an unauthenticated XML External Entity (XXE) vulnerability in the Checkin processing functionality, allowing for administrator account takeover and file read primitives.

Critical Impact
This vulnerability could lead to unauthorized access and exposure of sensitive files, potentially resulting in administrator account takeover.

Affected Products

SysAid On-Prem (versions <= 23.3.40)

Discovery Timeline

2025-05-07 - CVE CVE-2025-2775 published to NVD
2025-10-27 - Last updated in NVD database

Technical Details for CVE-2025-2775

Vulnerability Analysis

The XML External Entity (XXE) vulnerability in the Checkin processing functionality allows attackers to inject malicious XML, leading to harmful operations such as reading system files and potentially taking over administrator accounts.

Root Cause

The vulnerability is due to improper handling of XML input data, particularly a lack of secure XML parsing, which allows external entities to be processed and executed.

Attack Vector

The attack can be executed over the network, as the vulnerable endpoint processes untrusted XML input from remote sources.

xml

<!DOCTYPE root [
  <!ELEMENT root ANY >
  <!ENTITY xxe SYSTEM "file:///etc/passwd" >
]>
<root>&xxe;</root>

Detection Methods for CVE-2025-2775

Indicators of Compromise

Unusual file access patterns
Unauthorized administrator logins
Unexpected XML processing logs

Detection Strategies

Monitoring XML processing functions for unusual activities and auditing system access logs can help detect exploit attempts.

Monitoring Recommendations

Use intrusion detection solutions to monitor for malformed XML content and unusual file access requests.

How to Mitigate CVE-2025-2775

Immediate Actions Required

Disable XML entity processing in all critical services
Enhance logging around XML inputs
Regularly audit system permissions

Patch Information

Apply the latest security patches from the vendor as soon as they become available. Refer to SysAid's Release Notes for update details.

Workarounds

Implement input validation and use a secure XML parser that prohibits external entity processing to mitigate the risk of XXE attacks.

bash

# Configuration example
java -jar app.jar -DentityExpansionLimit=0