dbcve.org
Manageengine Adselfservice PlusApplication · Zohocorp

CVE-2021-33055

CRITICAL · 9.8 CVSS v3.1 Published 2021-08-30
Fix available
A fix is available. Upgrade to 6.1 or later.
See remediation →
100/100
Remediation priority · Urgent
Remotely reachable No privileges Zero-click Patch available

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 ADSelfService Plus through 6102 allows unauthenticated remote code execution in non-English editions.

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
How this class of weakness works · CWE-78

User input reaches a shell or system command without being fully separated from the command itself, so an attacker can append their own instructions. Because these run with the application's privileges, it often means full control of the host. The lasting fix is to avoid the shell entirely — call APIs directly and pass arguments as data, never as concatenated strings.

General guidance for the os command injection class — the official description and references above are authoritative for this specific CVE. Want a bespoke review and a reviewed fix? Ask our team →

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 Adselfservice PlusApplication
Affected:< 6.1= 6.1

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

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
Upgrade available Upgrade to 6.1 or later
Fixed in 6.1
Vendor patch pitstop.manageengine.com →
Recommended fix Moderate confidence

ADSelfService Plus version 6104 (6.1.04)

  1. Verify current ADSelfService Plus version by accessing the admin console or checking the product UI
  2. Backup the current ADSelfService Plus installation and database before proceeding with the upgrade
  3. Download ADSelfService Plus version 6104 (6.1.04) from the official ManageEngine vendor portal at https://pitstop.manageengine.com/portal/en/community/topic/adselfservice-plus-6104-released
  4. Stop the ADSelfService Plus service before upgrading
  5. Install or upgrade to version 6104 following the standard upgrade procedures documented by ManageEngine
  6. After upgrade, verify the service is running and the new version is installed
  7. Confirm the vulnerability is addressed by reviewing release notes or patch documentation for version 6104
Caveat Review ManageEngine release notes for version 6104 for any feature changes or configuration requirements; test thoroughly in non-production environment first

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

We can perform the upgrade in your staging environment and verify nothing breaks — typical engagement from $3,550. Get the upgrade done

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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-2021-33055 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