CVE-2021-44651Public exploitNetwork attack vector

Code execution via Struts action upload bypass

Published Jan 12, 2022 · Updated Aug 4, 2024

Arbitrary file upload in Zoho ManageEngine CloudSecurityPlus before Build 4117 allows remote authenticated users to execute code. The updatePersonalizeSettings Struts action bypasses URL-path security rules and accepts a double-extension JSP as an image upload. A valid session and one crafted request are required; the uploaded JSP executes with the application server's privileges.

CVSS severity8.8
High
EPSS probability5.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Arbitrary file upload in Zoho ManageEngine CloudSecurityPlus before Build 4117 allows remote authenticated users to execute code. The updatePersonalizeSettings Struts action bypasses URL-path security rules and accepts a double-extension JSP as an image upload. A valid session and one crafted request are required; the uploaded JSP executes with the application server's privileges.

The record

CVE
CVE-2021-44651
Published
Jan 12, 2022
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-434, T1505.003, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 12, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
6.5NIST NVDAV:N/AC:L/Au:S/C:P/I:P/A:P

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-434Unrestricted Upload of File with Dangerous Type
T1505.003Web Shell
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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