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MEDIUM severity

CVE-2020-27666 — strapi-plugin-content-man…

MEDIUMFix: strapi/strapi#8440

CVE-2020-27666 is a medium-severity (CVSS 5.4) Cross-site Scripting (XSS) vulnerability in strapi-plugin-content-manager. A fix is available for strapi-plugin-content-manager — see the affected versions and patch details below.

Cross-site Scripting in Strapi

Also known asGHSA-qvp5-mm7v-4f36
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed
Exploitation data as of Oct 10, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
0.7%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs52th percentile — riskier than 52% of all scored CVEsHighest risk
0.00%0.41%0.81%1.22%0.3%0.7%Apr 26Aug 26Oct 26

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

How urgent is this, really

CVE-2020-27666 by exploitation likelihood (EPSS) against impact (CVSS). Outside the shaded patch-first corner.

Where this sits among everything scored

Of 385,738 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Counts from FIRST.org, log-scaled.

Real-World Exposure

1 pkg affected

How broadly this vulnerability is actually deployed: weekly install volume shows current usage, a proxy for how much of the ecosystem is exposed.

strapi-plugin-content-managernpm
9Kdownloads / week

Description

Strapi before 3.2.5 has stored XSS in the wysiwyg editor's preview feature.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
📦npmstrapi-plugin-content-managerall versions3.2.5npm install strapi-plugin-content-manager@3.2.5

Affected Products

1 product · 1 configurations
Application
strapistrapi
< 3.2.5
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 strapi-plugin-content-manager, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update strapi-plugin-content-manager to 3.2.5 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2020-27666 is resolved across your whole dependency graph.

  3. Workarounds

    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

Strapi before 3.2.5 has stored XSS in the wysiwyg editor's preview feature.
O3 Security · Impact-Aware SCA

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CVE-2020-27666: strapi-plugin-content XSS — Fixed in 3.2.5