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🐍 PyPI
Not in CISA KEV
MEDIUM severity

CVE-2020-7937 — plone

MEDIUM

CVE-2020-7937 is a medium-severity (CVSS 5.4) Cross-site Scripting (XSS) vulnerability in plone. The records list no fixed version yet; check the vendor advisory below and apply the mitigations in the meantime.

Plone cross site scripting (XSS)

Also known asGHSA-8mc4-2xrc-g582PYSEC-2020-86
Published
Updated
Affected
1 pkg
Patched
See advisory
Exploits
None indexed
Exploitation data as of Nov 3, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
0.8%probability of exploitation in next 30 days
Lower Risk-0.01%
Lower risk than most CVEs57th percentile — riskier than 57% of all scored CVEsHighest risk
0.00%0.44%0.87%1.31%0.5%0.8%May 26Sep 26Nov 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

1 pkg affected
🐍plone

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects PyPI packages — download data is not available via public APIs for these ecosystems.

Description

An XSS issue in the title field in Plone 5.0 through 5.2.1 allows users with a certain privilege level to insert JavaScript that will be executed when other users access the site.

Affected Packages

1 total
EcosystemPackageVulnerable rangeFix
🐍PyPIplone≥ 5.0No fix

Affected Products

1 product · 1 configurations
Application
ploneplone
≥ 5.0 && ≤ 5.2.1
range

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for plone, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Remediation status

    The records we use list no patched version of plone for CVE-2020-7937. Check the maintainer's advisory, and where your build allows, override or pin the dependency away from the vulnerable range.

  3. Mitigate without a patch

    Escape or sanitise the affected output on the server side rather than relying on client-side filtering, and add a Content-Security-Policy that blocks inline script execution so injected markup cannot run even if it reaches the page.

Frequently Asked Questions

An XSS issue in the title field in Plone 5.0 through 5.2.1 allows users with a certain privilege level to insert JavaScript that will be executed when other users access the site.
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CVE-2020-7937: plone: Plone cross site scripting (XSS)