← Vulnerability feed

Vulnerability record · CVE-2021-20147 · published 3 January 2022

CVE-2021-20147: Zohocorp manageengine adselfservice plus observable discrepancy vulnerability

Zohocorp · Manageengine Adselfservice Plus

ManageEngine ADSelfService Plus below build 6116 contains an observable response discrepancy in the UMCP operation of the ChangePasswordAPI. This allows an unauthenticated remote attacker to determine whether a Windows domain user exists.

5.3 CVSS 3.1 Medium EPSS 6.9% · top 6.1% CWE-203 · Observable discrepancy
5.3CVSS 3.1 base score, v2 5.0
6.9%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

ManageEngine ADSelfService Plus below build 6116 contains an observable response discrepancy in the UMCP operation of the ChangePasswordAPI. This allows an unauthenticated remote attacker to determine whether a Windows domain user exists.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://www.tenable.com/security/research/tra-2021-52 ExploitThird Party Advisory
https://www.tenable.com/security/research/tra-2021-52 ExploitThird Party Advisory

Track CVE-2021-20147 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2022-47966Zoho ManageEngine on-premise products RCE via SAML SSO and xmlsecMultiple Zoho ManageEngine on-premise products use Apache Santuario xmlsec 1.4.1, whose XSLT features by design leave certain security protections to…KEVEPSS 100%analysed9.8CVE-2021-40539Zoho ManageEngine ADSelfService Plus REST API auth bypass to RCEZoho ManageEngine ADSelfService Plus version 6113 and prior contains an authentication bypass in its REST API that leads to remote code execution. Be…KEVEPSS 99%analysed6.8CVE-2022-28810Zoho ManageEngine ADSelfService Plus OS command injection via custom scriptZoho ManageEngine ADSelfService Plus before build 6122 lets a remote authenticated administrator run arbitrary OS commands as SYSTEM through the poli…KEVEPSS 71%analysed10.0CVE-2019-3905Zohocorp manageengine adselfservice plus server-side request forgery (ssrf) vulnerabilityZoho ManageEngine ADSelfService Plus 5.x before build 5703 has SSRF.EPSS 3.3%9.8CVE-2023-35854Zohocorp manageengine adselfservice plus missing authentication for critical function vulnerabilityZoho ManageEngine ADSelfService Plus through 6113 has an authentication bypass that can be exploited to steal the domain controller session token for…EPSS 6.0%9.8CVE-2021-37422Zohocorp manageengine adselfservice plus sql injection vulnerabilityZoho ManageEngine ADSelfService Plus 6111 and prior is vulnerable to SQL Injection while linking the databases.EPSS 3.4%9.8CVE-2021-37423Zohocorp manageengine adselfservice plus vulnerabilityZoho ManageEngine ADSelfService Plus 6111 and prior is vulnerable to linked applications takeover.EPSS 2.8%9.8CVE-2021-37417Zohocorp manageengine adselfservice plus improper authentication vulnerabilityZoho ManageEngine ADSelfService Plus version 6103 and prior allows CAPTCHA bypass due to improper parameter validation.EPSS 4.8%

Source: NIST National Vulnerability Database (record CVE-2021-20147), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.