CVE-2022-0921Network attack vector

Authenticated code execution via unfiltered backup archives

Published Mar 11, 2022 · Updated Aug 2, 2024

Unrestricted file upload in Microweber before 1.2.12 allows remote authenticated users to execute code through Backup/Restore. ZipReader extracts archive members into the web-accessible userfiles tree without rejecting dangerous PHP files, allowing uploaded scripts to execute. Administrative Backup/Restore access is required, and successful exploitation grants control of the server-side application and its data.

CVSS severity7.2
High
EPSS probability2.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Unrestricted file upload in Microweber before 1.2.12 allows remote authenticated users to execute code through Backup/Restore. ZipReader extracts archive members into the web-accessible userfiles tree without rejecting dangerous PHP files, allowing uploaded scripts to execute. Administrative Backup/Restore access is required, and successful exploitation grants control of the server-side application and its data.

The record

CVE
CVE-2022-0921
Published
Mar 11, 2022
Updated
Aug 2, 2024
Vendor
Microweber
Product
Microweber
Classifications
CWE-94, CWE-434, T1190
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Mar 11, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 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=unspecified <1.2.12

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Microweber · Microweberversion=unspecified <1.2.12

Published CVSS scores

6.5NVDAV:N/AC:L/Au:S/C:P/I:P/A:P
7.2huntr.devCVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
6.7NVDCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-94Improper Control of Generation of Code ('Code Injection')
CWE-434Unrestricted Upload of File with Dangerous Type
T1190Exploit Public-Facing Application

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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