CVE-2022-0926Network attack vector

Stored XSS via incomplete upload extension blocklist

Published Mar 12, 2022 · Updated Aug 2, 2024

Stored XSS in Microweber before 1.2.12 allows attackers to upload active web content that executes when another user opens it. The Files.php dangerous-extension denylist omitted numerous web-executable extensions, including HTML, so the upload filter accepted content capable of running script. Exploitation requires a user to open the stored upload, where its script runs in that user's browser context and can read or alter accessible page data.

CVSS severity7.1
High
EPSS probability0.78%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in Microweber before 1.2.12 allows attackers to upload active web content that executes when another user opens it. The Files.php dangerous-extension denylist omitted numerous web-executable extensions, including HTML, so the upload filter accepted content capable of running script. Exploitation requires a user to open the stored upload, where its script runs in that user's browser context and can read or alter accessible page data.

The record

CVE
CVE-2022-0926
Published
Mar 12, 2022
Updated
Aug 2, 2024
Vendor
Microweber
Product
Microweber
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
Unavailable

Timeline

How it unfolded

  1. Mar 12, 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 privilegesUnavailable in this record.

What is affected?

Microweber · Microweberversion=unspecified <1.2.12

Published CVSS scores

3.5NVDAV:N/AC:M/Au:S/C:N/I:P/A:N
4.8NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
7.1huntr.devCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007JavaScript/JScript

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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