Read the docs
TI-2020-17402 Aliases CVE-2020-28736GHSA-2c8c-84w2-j38j

Plone before 5.2.3 allows XXE attacks via a feature that is protected by an unapplied…

Priority MEDIUM 41CWE-611Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub.

Summary

Plone before 5.2.3 allows XXE attacks via a feature that is protected by an unapplied permission of plone.schemaeditor.ManageSchemata (therefore, only available to the Manager role).

Why it matters now

EPSS 0.01453 73rd percentileScored 2026-11-07
Fix Fixed Plone (PyPI): 5.2.3plone.app.event (PyPI): 3.2.10+3 more products

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
—Plone (PyPI)before 5.2.35.2.3Patch availableGHSA-2c8c-84w2-j38j
—plone.app.event (PyPI)before 3.2.103.2.10Patch availableGHSA-2c8c-84w2-j38j
—plone.app.theming (PyPI)before 4.1.64.1.6Patch availableGHSA-2c8c-84w2-j38j
—plone.app.dexterity (PyPI)before 2.6.82.6.8Patch availableGHSA-2c8c-84w2-j38j
—plone.supermodel (PyPI)before 1.6.31.6.3Patch availableGHSA-2c8c-84w2-j38j
  • — Vendor— Affected all versions Fixed in — No fix listed CNA
  • Plone (PyPI) Vendor— Affected before 5.2.3 Fixed in 5.2.3 Patch available GHSA-2c8c-84w2-j38j
  • plone.app.event (PyPI) Vendor— Affected before 3.2.10 Fixed in 3.2.10 Patch available GHSA-2c8c-84w2-j38j
  • plone.app.theming (PyPI) Vendor— Affected before 4.1.6 Fixed in 4.1.6 Patch available GHSA-2c8c-84w2-j38j
  • plone.app.dexterity (PyPI) Vendor— Affected before 2.6.8 Fixed in 2.6.8 Patch available GHSA-2c8c-84w2-j38j
  • plone.supermodel (PyPI) Vendor— Affected before 1.6.3 Fixed in 1.6.3 Patch available GHSA-2c8c-84w2-j38j

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:plone:plone:*:*:*:*:*:*:*:*before 5.2.3Vulnerableplone
  • cpe:2.3:a:plone:plone:*:*:*:*:*:*:*:* Versions before 5.2.3 Vulnerable ·plone

Remediation

  • Fix · GHSA-2c8c-84w2-j38j Plone (PyPI) Fixed in 5.2.3 Advisory →
  • Fix · GHSA-2c8c-84w2-j38j plone.app.event (PyPI) Fixed in 3.2.10 Advisory →
  • Fix · GHSA-2c8c-84w2-j38j plone.app.theming (PyPI) Fixed in 4.1.6 Advisory →
  • Fix · GHSA-2c8c-84w2-j38j plone.app.dexterity (PyPI) Fixed in 2.6.8 Advisory →
  • Fix · GHSA-2c8c-84w2-j38j plone.supermodel (PyPI) Fixed in 1.6.3 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2020-28736
  2. 2026-10-03 Alias added: GHSA-2c8c-84w2-j38j

References

Patch 1

Advisory 3

Other 2

  • TI-2011-03162 Unspecified vulnerability in Zope 2.12.x and 2.13.x, as used in Plone 4.0.x through… CVSS 2.0HIGH 9.3
  • TI-2021-13226 An issue in Plone CMS v. CVSS 3.1HIGH 8.8
  • TI-2024-15757 The HTTP PUT and DELETE methods are enabled in the Plone official Docker version 5.2.13… CVSS 3.1HIGH 7.5
  • TI-2021-12911 Plone through 5.2.4 allows remote authenticated managers to perform disk I/O via crafted… CVSS 3.1CRITICAL 9.9
  • TI-2020-17872 The official plone Docker images before version of 4.3.18-alpine (Alpine specific)… CVSS 3.1CRITICAL 9.8
  • TI-2020-06422 A privilege escalation issue in plone.app.contenttypes in Plone 4.3 through 5.2.1 allows… CVSS 3.1CRITICAL 9.8
See all 102 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences