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TI-2021-02317 Aliases CVE-2021-3313GHSA-hprr-4vfq-fcxw

Plone CMS until version 5.2.4 has a stored Cross-Site Scripting (XSS) vulnerability in…

Priority LOW 26CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
Required
Attack complexity
Low
Impact type
Cross-site scripting
Confidentiality · integrity · availability
Low · Low · None
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-79.

Summary

Plone CMS until version 5.2.4 has a stored Cross-Site Scripting (XSS) vulnerability in the user fullname property and the file upload functionality. The user's input data is not properly encoded when being echoed back to the user. This data can be interpreted as executable code by the browser and allows an attacker to execute JavaScript in the context of the victim's browser if the victim opens a vulnerable page containing an XSS payload.

Why it matters now

EPSS 0.00983 62nd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed Plone (PyPI): 5.2.4

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 5.2.45.2.4Patch availableGHSA-hprr-4vfq-fcxw
  • — Vendor— Affected all versions Fixed in — No fix listed CNA
  • Plone (PyPI) Vendor— Affected before 5.2.4 Fixed in 5.2.4 Patch available GHSA-hprr-4vfq-fcxw

CPE configurations NVD · 1

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

Remediation

  • Fix · GHSA-hprr-4vfq-fcxw Plone (PyPI) Fixed in 5.2.4 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-3313
  2. 2026-10-03 Alias added: GHSA-hprr-4vfq-fcxw

References

Exploit 1

Advisory 4

Other 4

  • 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