CVE-2022-0937Public exploitNetwork attack vector

Stored XSS via unblocked SHTML uploads

Published Mar 14, 2022 · Updated Aug 2, 2024

Stored XSS in ShowDoc before 2.10.4 allows remote authenticated users to run script in another user's browser through a file upload. AttachmentModel::isDangerFilename fails to reject filenames containing .shtm, leaving an uploaded SHTML document available from the web application. A low-privileged account can store the payload, and execution occurs when another user opens the file, allowing the script to read or alter data available to that browser session.

CVSS severity6.3
Medium
EPSS probability0.55%
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 ShowDoc before 2.10.4 allows remote authenticated users to run script in another user's browser through a file upload. AttachmentModel::isDangerFilename fails to reject filenames containing .shtm, leaving an uploaded SHTML document available from the web application. A low-privileged account can store the payload, and execution occurs when another user opens the file, allowing the script to read or alter data available to that browser session.

The record

CVE
CVE-2022-0937
Published
Mar 14, 2022
Updated
Aug 2, 2024
Vendor
ShowDoc
Product
ShowDoc
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 14, 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

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=unspecified <2.10.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

ShowDoc · ShowDocversion=unspecified <2.10.4

Published CVSS scores

6.3huntr.devCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
5.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
3.5NIST NVDAV:N/AC:M/Au:S/C:N/I:P/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

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

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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