CVE-2023-39345: Unauthorized Access to Private Fields in User Registration API in strapi

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2023-11-06 · updated 2026-06-17
Weakness: CWE-287

Description

strapi is an open-source headless CMS. Versions prior to 4.13.1 did not properly restrict write access to fielded marked as private in the user registration endpoint. As such malicious users may be able to errantly modify their user records. This issue has been addressed in version 4.13.1. Users are advised to upgrade. There are no known workarounds for this vulnerability.

Affected products

strapi: from 4.0.0 before 4.13.1 — fixed in 4.13.1

How to fix

Upgrade to a fixed version: strapi 4.13.1. Check the vendor advisory for mitigations.

References

https://github.com/strapi/strapi/security/advisories/GHSA-gc7p-j5xm-xxh2
https://github.com/strapi/strapi/security/advisories/GHSA-gc7p-j5xm-xxh2

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