CVE-2021-35959: Plone has stored XSS in folder contents

CVE-2021-35959 · Severity: low · CVSS 3.1 · Published 2021-06-30

In Plone 5.0 through 5.2.4, Editors are vulnerable to XSS in the folder contents view, if a Contributor has created a folder with a SCRIPT tag in the description field.

Technologies: plone (PyPI). Vendors: PyPI.

Quick answers

Is CVE-2021-35959 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2021-35959 being exploited in the wild.
How severe is CVE-2021-35959?
Low severity, with a CVSS score of 3.1, published 30 June 2021.
Which products and versions are affected?
plone (PyPI) ECOSYSTEM:introduced=5.0,fixed=5.2.5, ECOSYSTEM:introduced=5.0,last_affected=5.2.4.
Is there a fix for CVE-2021-35959?
Yes. plone (PyPI): upgrade to 5.2.5 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
Am I affected by CVE-2021-35959?
Check whether you run plone (PyPI) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • plone (PyPI): upgrade to 5.2.5 or later
    pip install "plone>=5.2.5"

Affected products

  • plone (PyPI) ECOSYSTEM:introduced=5.0,fixed=5.2.5, ECOSYSTEM:introduced=5.0,last_affected=5.2.4

Identifiers

  • CVE-2021-35959
  • GHSA-qfhw-fv3g-v836
  • PYSEC-2021-110

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