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HIGH severity

CVE-2020-27665 — strapi-plugin-content-typ…

HIGHFix: strapi/strapi#8439

CVE-2020-27665 is a high-severity (CVSS 7.5) Incorrect Default Permissions vulnerability in strapi-plugin-content-type-builder. A fix is available for strapi-plugin-content-type-builder — see the affected versions and patch details below.

Improper Authorization in Strapi

Also known asGHSA-4p55-xj37-fx7g
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed
Exploitation data as of Oct 8, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
1.2%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs68th percentile — riskier than 68% of all scored CVEsHighest risk
0.00%0.57%1.14%1.71%0.3%1.2%Apr 26Aug 26Oct 26

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

How urgent is this, really

CVE-2020-27665 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-type-buildernpm
9Kdownloads / week

Description

In Strapi before 3.2.5, there is no admin::hasPermissions restriction for CTB (aka content-type-builder) routes.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
📦npmstrapi-plugin-content-type-builderall versions3.2.5npm install strapi-plugin-content-type-builder@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-type-builder, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update strapi-plugin-content-type-builder to 3.2.5 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2020-27665 is resolved across your whole dependency graph.

  3. Workarounds

    Close the privilege gap rather than the entry point: audit which accounts, roles and service identities can reach the affected operation, drop the component to the least privilege it actually needs, and review file and directory permissions created by earlier installs — a default left in place is what makes this reachable.

Frequently Asked Questions

In Strapi before 3.2.5, there is no admin::hasPermissions restriction for CTB (aka content-type-builder) routes.
O3 Security · Impact-Aware SCA

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CVE-2020-27665: strapi-plugin-content-typ… — Fixed in 3.2.5