CVE-2022-0896Public exploitNetwork attack vector

Code execution via insufficient comment sanitization

Published Mar 9, 2022 · Updated Aug 2, 2024

Template injection in Microweber before 1.3 allows remote attackers to execute code through a crafted stored comment body. AdminCommentController sanitizes comment_body with generic HTML and XSS cleaners before converting Markdown to HTML, leaving template syntax insufficiently neutralized; the patch replaces those cleaners with HTMLClean::onlyTags. Exploitation requires administrative interaction with the stored comment, and successful payloads can compromise application data and service availability.

CVSS severity8.8
High
EPSS probability1.41%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Template injection in Microweber before 1.3 allows remote attackers to execute code through a crafted stored comment body. AdminCommentController sanitizes comment_body with generic HTML and XSS cleaners before converting Markdown to HTML, leaving template syntax insufficiently neutralized; the patch replaces those cleaners with HTMLClean::onlyTags. Exploitation requires administrative interaction with the stored comment, and successful payloads can compromise application data and service availability.

The record

CVE
CVE-2022-0896
Published
Mar 9, 2022
Updated
Aug 2, 2024
Vendor
Microweber
Product
Microweber
Classifications
CWE-1336, CWE-94, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 9, 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 <1.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Microweber · Microweberversion=unspecified <1.3

Published CVSS scores

7.1huntr.devCVSS:3.0/AV:P/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:H
6.8NIST NVDAV:N/AC:M/Au:N/C:P/I:P/A:P
8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/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.

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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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-1336Improper Neutralization of Special Elements Used in a Template Engine
CWE-94Improper Control of Generation of Code ('Code Injection')
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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