CVE-2021-32630Network attack vector

Authenticated RCE via dangerous .phar upload

Published May 20, 2021 · Updated Aug 3, 2024

Admidio before 4.0.4 allows remote authenticated users with upload permissions to execute code through a crafted .phar file. The Documents & Files upload accepts a renamed PHP web shell, and visiting the uploaded file triggers reverse or bind shell execution. Exploitation requires an account allowed to upload files and can provide full server code execution.

CVSS severity9.6
Critical
EPSS probability1.59%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Admidio before 4.0.4 allows remote authenticated users with upload permissions to execute code through a crafted .phar file. The Documents & Files upload accepts a renamed PHP web shell, and visiting the uploaded file triggers reverse or bind shell execution. Exploitation requires an account allowed to upload files and can provide full server code execution.

The record

CVE
CVE-2021-32630
Published
May 20, 2021
Updated
Aug 3, 2024
Vendor
Admidio
Product
Admidio
Classifications
CWE-434, T1505.003
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 20, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 4.0.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Admidio · Admidioversion=< 4.0.4

Published CVSS scores

7.5NVDAV:N/AC:L/Au:S/C:P/I:P/A:P
9.6NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N

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 exploitUnconfirmed

Weakness, pattern, technique

CWE-434Unrestricted Upload of File with Dangerous Type
T1505.003Server Software Component: Web Shell

Public exploit references

No public exploit references are available in this record.

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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