dbcve.org
Manageengine Access Manager PlusApplication · Zohocorp

CVE-2021-44676

CRITICAL · 9.8 CVSS v3.1 Published 2021-12-20
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
100/100
Remediation priority · Urgent
Remotely reachable No privileges Zero-click

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
Zoho ManageEngine Access Manager Plus before 4203 allows anyone to view a few data elements (e.g., access control details) and modify a few aspects of the application state.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · moderate confidence

Critical unauthenticated vulnerability in Zoho ManageEngine Access Manager Plus versions before 4203 allows remote attackers to view sensitive access control details and modify application state without authentication.

MitigationUpgrade Access Manager Plus to version 4203 or later to remediate this vulnerability.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
Manageengine Access Manager PlusApplication
Affected:= 4.1= 4.2

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

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

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Identify product and version
    Access the ManageEngine Access Manager Plus admin console or check the installation directory for version.txt. Alternatively, send an HTTP request to the application root and examine the version information in the response headers or login page.
    Affected if The installed version is 4.1 or 4.2 (exact versions as listed in affected products)
  2. Confirm unauthenticated access endpoint exists
    Attempt to access sensitive API endpoints without providing authentication credentials. Check if endpoints related to access control details (such as /api/ldap/ or /api/access/) are accessible without login.
    Affected if The application returns sensitive access control configuration or allows state modification without any authentication token or session
  3. Verify application responds to unauthenticated requests
    Send a crafted HTTP GET or POST request to common application endpoints without including any authentication headers or cookies.
    Affected if The server responds with application data or allows operations without returning an authentication error (401 or redirect to login)
  4. Check for sensitive data exposure
    Inspect responses from unauthenticated endpoints for exposure of user accounts, roles, permissions, or access control policies.
    Affected if Response contains sensitive access control details such as user lists, privilege assignments, or security configurations

The environment is affected if ManageEngine Access Manager Plus version 4.1 or 4.2 is running and unauthenticated endpoints are accessible without authentication, allowing exposure of access control details or modification of application state.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Upgrade Access Manager Plus to version 4203 or later to remediate this vulnerability.

Recommended fix High confidence

Access Manager Plus 4203 or later

  1. Backup the current Access Manager Plus configuration and database
  2. Download Access Manager Plus version 4203 or later from the official ManageEngine download portal (www.manageengine.com)
  3. Stop the Access Manager Plus service before upgrading
  4. Run the installer/upgrade package for version 4203 or newer
  5. Follow the on-screen prompts to complete the upgrade process
  6. Restart the Access Manager Plus service
  7. Verify the upgrade was successful by logging in and confirming the version number
  8. Test that the authentication mechanisms are working properly

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Manageengine Access Manager Plus Scoped from the published advisory
  • Consultation2.0 h
  • Implementation4.0 h
  • Testing3.0 h
  • Review / QA1.0 h
10.0 hours of engineering $1,750
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2021-44676 in production — separate from our analysis above.

No notes yet

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data