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Critical, CVSS 9.3amended

Plone Unauthenticated Write Vulnerability

CVE-2020-7941GHSA-w6g9-xccc-347h

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

  • PyPI plone

    Affected
    >= 4.3, <= 5.2.1
    Fixed in
    no fixed version recorded

  • PyPI plone-app-contenttypes

    Affected
    every version
    Fixed in
    no fixed version recorded

Sources

Severity and exploitation
Exploitation
No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.
CVSS 4.0
9.3 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N · score source
EPSS
  • CVE-2020-7941: 2.27% estimated exploitation activity in the next 30 days; percentile 83.06 (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.

A privilege escalation issue in plone.app.contenttypes in Plone 4.3 through 5.2.1 allows users to PUT (overwrite) some content without needing write permission.

Dates and revisions
Published by the source
Last modified by the source
Source last checked
  1. Revision 2 · amended ·

    Reviewed OSV alias/range/CVSS4 correction; package source scopes and original publication preserved. No customer finding resolved.

  2. Revision 1 · created ·

    Published from osv record GHSA-w6g9-xccc-347h

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-2020-7941

Advisory: Plone Unauthenticated Write Vulnerability
IDs: CVE-2020-7941, GHSA-w6g9-xccc-347h
Record: https://patchnext.com/advisories/cve-2020-7941 (revision 2, source checked 25 Oct 2026, 04:38 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Critical (CVSS 9.3)
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
- PyPI plone: affected >= 4.3, <= 5.2.1
- PyPI plone-app-contenttypes: affected every version

## Suggested inspection (read-only)
- `python -m pip show plone`: prints the installed version. Run with the environment that serves production active.
- `python -m pip show plone-app-contenttypes`: prints the installed version. Run with the environment that serves production active.

## 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 plone, plone-app-contenttypes.
- 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://osv.dev/vulnerability/GHSA-w6g9-xccc-347h (OSV record GHSA-w6g9-xccc-347h lists affected ranges: PyPI plone >=4.3 =0)

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