Plone before 5.2.3 allows XXE attacks via a feature that is explicitly only available to the Manager role.
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 explicitly 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
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
| — | Plone (PyPI) | before 5.2.3 | 5.2.3 | Patch available | GHSA-wq6x-g685-w5f2 |
| — | plone.app.event (PyPI) | before 3.2.10 | 3.2.10 | Patch available | GHSA-wq6x-g685-w5f2 |
| — | plone.app.theming (PyPI) | before 4.1.6 | 4.1.6 | Patch available | GHSA-wq6x-g685-w5f2 |
| — | plone.app.dexterity (PyPI) | before 2.6.8 | 2.6.8 | Patch available | GHSA-wq6x-g685-w5f2 |
| — | plone.supermodel (PyPI) | before 1.6.3 | 1.6.3 | Patch available | GHSA-wq6x-g685-w5f2 |
- — 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-wq6x-g685-w5f2
- plone.app.event (PyPI) Vendor— Affected before 3.2.10 Fixed in 3.2.10 Patch available GHSA-wq6x-g685-w5f2
- plone.app.theming (PyPI) Vendor— Affected before 4.1.6 Fixed in 4.1.6 Patch available GHSA-wq6x-g685-w5f2
- plone.app.dexterity (PyPI) Vendor— Affected before 2.6.8 Fixed in 2.6.8 Patch available GHSA-wq6x-g685-w5f2
- plone.supermodel (PyPI) Vendor— Affected before 1.6.3 Fixed in 1.6.3 Patch available GHSA-wq6x-g685-w5f2
Remediation
- Fix · GHSA-wq6x-g685-w5f2 Plone (PyPI) Fixed in 5.2.3 Advisory →
- Fix · GHSA-wq6x-g685-w5f2 plone.app.event (PyPI) Fixed in 3.2.10 Advisory →
- Fix · GHSA-wq6x-g685-w5f2 plone.app.theming (PyPI) Fixed in 4.1.6 Advisory →
- Fix · GHSA-wq6x-g685-w5f2 plone.app.dexterity (PyPI) Fixed in 2.6.8 Advisory →
- Fix · GHSA-wq6x-g685-w5f2 plone.supermodel (PyPI) Fixed in 1.6.3 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2020-28734
- 2026-10-03 Alias added: GHSA-wq6x-g685-w5f2
References
Advisory 3
More Plone vulnerabilities
- 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
Sources
- CVE-2020-28734 · CVE Program
- CVE-2020-28734 · NVD
- FIRST EPSS
- GHSA-wq6x-g685-w5f2 · GitHub Advisory Database · CC BY 4.0
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