Read the docs
TI-2021-12913 Aliases CVE-2021-33511GHSA-gc9g-67cq-p7v4

Plone though 5.2.4 allows SSRF via the lxml parser.

Priority LOW 35CWE-918Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Information disclosure
Confidentiality · integrity · availability
High · None · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-918 and the CVSS impact.

Summary

Plone though 5.2.4 allows SSRF via the lxml parser. This affects Diazo themes, Dexterity TTW schemas, and modeleditors in plone.app.theming, plone.app.dexterity, and plone.supermodel.

Why it matters now

EPSS 0.0116 67th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

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)up to 5.2.4—No fix listedGHSA-gc9g-67cq-p7v4
  • — Vendor— Affected all versions Fixed in — No fix listed CNA
  • Plone (PyPI) Vendor— Affected up to 5.2.4 Fixed in — No fix listed GHSA-gc9g-67cq-p7v4

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:plone:plone:*:*:*:*:*:*:*:*up to 5.2.4Vulnerableplone
  • cpe:2.3:a:plone:plone:*:*:*:*:*:*:*:* Versions up to 5.2.4 Vulnerable ·plone

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-33511
  2. 2026-10-03 Alias added: GHSA-gc9g-67cq-p7v4

References

Advisory 4

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