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CVE-2021-40539

Zoho ManageEngine ADSelfService Plus version 6113 and prior is vulnerable to REST API authentication bypass with resultant remote code execution.

Basic Information

CVE State
PUBLISHED
Reserved Date
September 06, 2021
Published Date
September 07, 2021
Last Updated
October 21, 2025
Vendor
Zoho
Product
ManageEngine ADSelfService Plus
Description
Zoho ManageEngine ADSelfService Plus version 6113 and prior is vulnerable to REST API authentication bypass with resultant remote code execution.
Tags
cisa malware ransomware nuclei_scanner metasploit

CVSS Scores

CVSS v3.1

9.8 - CRITICAL

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

CVSS v2.0

7.5

Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P

SSVC Information

Exploitation
active
Automatable
Yes
Technical Impact
total

Exploit Status

Exploited in the Wild
Yes (2021-11-03 00:00:00 UTC) Source
Used in Malware
Yes (added 2021-11-03 00:00:00 UTC) Source

References

https://www.manageengine.com https://www.manageengine.com/products/self-service-password/kb/how-to-fix-authentication-bypass-vulnerability-in-REST-API.html http://packetstormsecurity.com/files/165085/ManageEngine-ADSelfService-Plus-Authentication-Bypass-Code-Execution.html

Known Exploited Vulnerability Information

Source Added Date
CISA 2021-11-03 00:00:00 UTC
CISA 2021-11-03 00:00:00 UTC

Scanner Integrations

Scanner URL Date Detected
Metasploit https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/windows/http/manageengine_adselfservice_plus_cve_2021_40539.rb 2025-04-28 15:02:54 UTC
Nuclei https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2021/CVE-2021-40539.yaml 2025-04-25 00:00:00 UTC

Potential Proof of Concepts

Warning: These PoCs have not been tested and could contain malware. Use at your own risk.

manageengine_adselfservice_plus_cve_2021_40539

Type: metasploit • Created: Unknown

Metasploit module for CVE-2021-40539

Bu0uCat/ADSelfService-Plus-RCE-CVE-2021-40539

Type: github • Created: 2024-10-16 11:23:43 UTC • Stars: 2

ADSelfService Plus RCE漏洞 检测工具 (二开)

synacktiv/CVE-2021-40539

Type: github • Created: 2021-11-03 14:49:27 UTC • Stars: 46

Exploitation code for CVE-2021-40539

DarkSprings/CVE-2021-40539

Type: github • Created: 2021-09-17 02:51:40 UTC • Stars: 2

CVE-2021-40539 POC

Timeline

  • CVE ID Reserved

  • CVE Published to Public

  • Exploit Used in Malware

  • Added to KEVIntel

  • Added to KEVIntel

  • Detected by Nuclei

  • Detected by Metasploit