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Critical, CVSS 9.0

PyroCMS vulnerable to stored Cross Site Scripting

CVE-2022-37721GHSA-cm7f-hf2g-ghrp

What to do

Vendor response not established. Follow the primary source's mitigation guidance and check back for a fix.

This page has no inventory attached, so it cannot say whether you are affected. A vendor fix is not proof that your deployment is fixed.

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Affected packages

  • Packagist pyrocms/pyrocms

    Affected
    <= 3.9.1
    Fixed in
    no fixed version recorded

Sources

Severity and exploitation
Exploitation
No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.
CVSS
9.0 · CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H
EPSS
  • CVE-2022-37721: 0.77% estimated exploitation activity in the next 30 days; percentile 55.65 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.
Source description

As published by the source; long descriptions are shortened.

PyroCMS 3.9 is vulnerable to a stored Cross Site Scripting (XSS) when a low privileged user, such as an author, injects a crafted html and javascript payload in a blog post, leading to full admin account takeover or privilege escalation.

Dates and revisions
Published by the source
Last modified by the source
Source last checked
  1. Revision 1 · created ·

    Published from ghsa record GHSA-cm7f-hf2g-ghrp

Agent brief

Preview the exact text before you copy it. Commands are read-only suggestions; review them before running anything.

# Patch Next advisory brief: CVE-2022-37721

Advisory: PyroCMS vulnerable to stored Cross Site Scripting
IDs: CVE-2022-37721, GHSA-cm7f-hf2g-ghrp
Record: https://patchnext.com/advisories/cve-2022-37721 (revision 1, source checked 26 Oct 2026, 14:09 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Critical (CVSS 9.0)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor response not established. A vendor fix does not mean a deployment is fixed.

## Affected components
- Packagist pyrocms/pyrocms: affected <= 3.9.1

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

## Supported action
No complete vendor fix is recorded. Follow the primary source's mitigation guidance and check this record again before closing anything.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on pyrocms/pyrocms.
- 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-cm7f-hf2g-ghrp (GitHub-reviewed advisory GHSA-cm7f-hf2g-ghrp lists affected ranges: Packagist pyrocms/pyrocms >=0 <=3.9.1)

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