CVE-2025-3835

Q: What is the severity of CVE-2025-3835?

CVE-2025-3835 has a CVSS score of 9.6 (CRITICAL). This vulnerability allows remote attackers to execute arbitrary code on ManageEngine Exchange Reporter Plus servers through the Content Search module. It affects all organizations running vulnerable versions of the software, potentially compromising email reporting systems and underlying infrastructure.

9.6 CRITICAL

Remote Code Execution

📋 TL;DR

This vulnerability allows remote attackers to execute arbitrary code on ManageEngine Exchange Reporter Plus servers through the Content Search module. It affects all organizations running vulnerable versions of the software, potentially compromising email reporting systems and underlying infrastructure.

💻 Affected Systems

Products:

ManageEngine Exchange Reporter Plus

Versions: 5721 and prior versions

Operating Systems: Windows, Linux

Default Config Vulnerable: ⚠️ Yes

Notes: All installations with Content Search module enabled are vulnerable. The module is typically enabled by default for reporting functionality.

📦 What is this software?

⚠️ Risk & Real-World Impact

🔴

Worst Case

Complete system compromise leading to data exfiltration, lateral movement within the network, ransomware deployment, and persistent backdoor installation.

🟠

Likely Case

Attacker gains initial foothold on the server, accesses sensitive Exchange data, and uses the compromised system for further attacks.

🟢

If Mitigated

Attack is blocked at network perimeter or detected before significant damage occurs, with only temporary service disruption.

🌐 Internet-Facing: HIGH - The vulnerability is remotely exploitable and affects a service that often faces the internet for reporting access.

🏢 Internal Only: HIGH - Even internally, the vulnerability allows attackers with network access to compromise the server.

🎯 Exploit Status

Public PoC: ✅ No

Weaponized: LIKELY

Unauthenticated Exploit: ⚠️ Yes

Complexity: LOW

Based on CVSS score and CWE-434 (Unrestricted Upload of File with Dangerous Type), exploitation is likely straightforward for attackers with basic skills.

🛠️ Fix & Mitigation

✅ Official Fix

Patch Version: 5722 or later

Vendor Advisory: https://www.manageengine.com/products/exchange-reports/advisory/CVE-2025-3835.html

Restart Required: Yes

Instructions:

1. Download the latest version from ManageEngine website. 2. Backup current installation. 3. Stop the Exchange Reporter Plus service. 4. Install the update. 5. Restart the service. 6. Verify functionality.

🔧 Temporary Workarounds

Disable Content Search Module

all

Temporarily disable the vulnerable Content Search module to prevent exploitation while planning patching.

Navigate to Admin > Module Settings > Content Search > Disable

Network Segmentation

all

Restrict network access to Exchange Reporter Plus server to only necessary administrative systems.

Configure firewall rules to limit inbound connections to specific IP ranges

🧯 If You Can't Patch

Isolate the Exchange Reporter Plus server in a dedicated network segment with strict access controls
Implement web application firewall (WAF) rules to block suspicious file upload patterns and Content Search module exploitation attempts

🔍 How to Verify

Check if Vulnerable:

Check the version number in the Exchange Reporter Plus web interface under Help > About. If version is 5721 or lower, the system is vulnerable.

Check Version:

On Windows: Check 'Programs and Features' for ManageEngine Exchange Reporter Plus version. On Linux: Check installation directory for version file or run the service with --version flag.

Verify Fix Applied:

After updating, verify the version shows 5722 or higher in Help > About, and test Content Search functionality to ensure it works without errors.

📡 Detection & Monitoring

Log Indicators:

Unusual file uploads to Content Search module
Suspicious process creation from Exchange Reporter Plus service
Error logs showing file type validation failures

Network Indicators:

Unexpected outbound connections from Exchange Reporter Plus server
Large data transfers from the server
Suspicious HTTP requests to Content Search endpoints

SIEM Query:

source="ExchangeReporterPlus" AND (event="FileUpload" OR event="ProcessCreate") AND severity=HIGH

📊 Metadata

CVE ID: CVE-2025-3835

CVSS v3 Score: 9.6 (CRITICAL)

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

CWE: CWE-434

EPSS Score: 1.04% exploit probability (77.1th percentile)

Published: June 9, 2025

Last Updated: September 29, 2025

🔗 References

https://www.manageengine.com/products/exchange-reports/advisory/CVE-2025-3835.html Vendor Advisory

📋 TL;DR

💻 Affected Systems

📦 What is this software?

Manageengine Exchange Reporter Plus by Zohocorp

Manageengine Exchange Reporter Plus by Zohocorp

Manageengine Exchange Reporter Plus by Zohocorp

Manageengine Exchange Reporter Plus by Zohocorp

Manageengine Exchange Reporter Plus by Zohocorp

Manageengine Exchange Reporter Plus by Zohocorp

Manageengine Exchange Reporter Plus by Zohocorp

Manageengine Exchange Reporter Plus by Zohocorp

Manageengine Exchange Reporter Plus by Zohocorp

Manageengine Exchange Reporter Plus by Zohocorp

Manageengine Exchange Reporter Plus by Zohocorp

Manageengine Exchange Reporter Plus by Zohocorp

Manageengine Exchange Reporter Plus by Zohocorp

Manageengine Exchange Reporter Plus by Zohocorp

Manageengine Exchange Reporter Plus by Zohocorp

Manageengine Exchange Reporter Plus by Zohocorp

Manageengine Exchange Reporter Plus by Zohocorp

Manageengine Exchange Reporter Plus by Zohocorp

Manageengine Exchange Reporter Plus by Zohocorp

Manageengine Exchange Reporter Plus by Zohocorp

Manageengine Exchange Reporter Plus by Zohocorp

Manageengine Exchange Reporter Plus by Zohocorp

Manageengine Exchange Reporter Plus by Zohocorp

⚠️ Risk & Real-World Impact

Worst Case

Likely Case

If Mitigated

🎯 Exploit Status

🛠️ Fix & Mitigation

✅ Official Fix

Instructions:

🔧 Temporary Workarounds

Disable Content Search Module

Network Segmentation

🧯 If You Can't Patch

🔍 How to Verify

Check if Vulnerable:

Check Version:

Verify Fix Applied:

📡 Detection & Monitoring

Log Indicators:

Network Indicators:

SIEM Query:

📊 Metadata

🔗 References

📤 Share & Export

🔗 Related Vulnerabilities