CVE-2022-0942Public exploitNetwork attack vector

Stored XSS via unsafe attachment extensions

Published Mar 15, 2022 · Updated Aug 2, 2024

Stored XSS in ShowDoc before 2.10.4 allows remote authenticated users to execute script in another user's browser through an uploaded file. AttachmentModel upload validation accepts crafted .xsd, .asa, and .aspx files and stores them at web-accessible attachment URLs. A logged-in user must upload the file, and another user must open its URL before script executes within the ShowDoc origin.

CVSS severity5.4
Medium
EPSS probability0.75%
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 execute script in another user's browser through an uploaded file. AttachmentModel upload validation accepts crafted .xsd, .asa, and .aspx files and stores them at web-accessible attachment URLs. A logged-in user must upload the file, and another user must open its URL before script executes within the ShowDoc origin.

The record

CVE
CVE-2022-0942
Published
Mar 15, 2022
Updated
Aug 2, 2024
Vendor
ShowDoc
Product
ShowDoc
Classifications
CWE-79
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 15, 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 <2.10.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

ShowDoc · ShowDocversion=unspecified <2.10.4

Published CVSS scores

9.4huntr.dev CNACVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:H
3.5NIST NVDAV:N/AC:M/Au:S/C:N/I:P/A:N
5.4GitHub Advisory DatabaseCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/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.

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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 exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

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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