Cross-site Scripting in ShowDoc

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS

5.4 · CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

EPSS

• CVE-2022-0941: 0.62% estimated exploitation activity in the next 30 days; percentile 49.73 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

ShowDoc is vulnerable to stored cross-site scripting due to unrestricted file upload in versions 2.10.3 and prior. A patch is available and anticipated to be part of version 2.10.4.

Published by the source

15 Mar 2022, 00:01 UTC

Last modified by the source

27 Jan 2023, 05:00 UTC

Source last checked

26 Oct 2026, 13:56 UTC

1. Revision 1 · created · 26 Oct 2026

   Published from ghsa record GHSA-wg4r-q74r-p7c8

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# Patch Next advisory brief: CVE-2022-0941

Advisory: Cross-site Scripting in ShowDoc
IDs: CVE-2022-0941, GHSA-wg4r-q74r-p7c8
Record: https://patchnext.com/advisories/cve-2022-0941 (revision 1, source checked 26 Oct 2026, 13:56 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Medium (CVSS 5.4)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: showdoc/showdoc 2.10.4. A vendor fix does not mean a deployment is fixed.

## Affected components
- Packagist showdoc/showdoc: affected <= 2.10.3; fixed in 2.10.4

## Suggested inspection (read-only)
- Packagist showdoc/showdoc: check the installed version with your package manager.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on showdoc/showdoc.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://github.com/advisories/GHSA-wg4r-q74r-p7c8 (GitHub-reviewed advisory GHSA-wg4r-q74r-p7c8 lists affected ranges: Packagist showdoc/showdoc >=0 <=2.10.3)

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