BaseFortify

Publication date: 2025-10-16

Last updated on: 2025-11-25

Assigner: GitHub, Inc.

Description

Strapi is an open source headless content management system. Strapi versions prior to 5.20.0 contain a CORS misconfiguration vulnerability in default installations. By default, Strapi reflects the value of the Origin header back in the Access-Control-Allow-Origin response header without proper validation or whitelisting. This allows an attacker-controlled site to send credentialed requests to the Strapi backend. An attacker can exploit this by hosting a malicious site on a different origin (e.g., different port) and sending requests with credentials to the Strapi API. The vulnerability is fixed in version 5.20.0. No known workarounds exist.

CVSS Scores

EPSS Scores

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Meta Information

Published

2025-10-16

Last Modified

2025-11-25

Generated

2026-07-06

AI Q&A

2025-10-16

EPSS Evaluated

2026-07-05

NVD

CVE-2025-53092

Affected Vendors & Products

Vendor	Product	Version / Range
strapi	strapi	to 5.20.0 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-284	The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.
CWE-200	The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.
CWE-942	The product uses a web-client protection mechanism such as a Content Security Policy (CSP) or cross-domain policy file, but the policy includes untrusted domains with which the web client is allowed to communicate.
CWE-364	The product uses a signal handler that introduces a race condition.

Attack-Flow Graph

Executive Summary

This vulnerability is a CORS misconfiguration in Strapi versions prior to 5.20.0. Strapi reflects the Origin header value back in the Access-Control-Allow-Origin response header without proper validation or whitelisting. This allows an attacker-controlled site on a different origin to send credentialed requests to the Strapi backend, potentially exploiting the system.

Impact Analysis

An attacker can exploit this vulnerability by hosting a malicious site on a different origin and sending requests with credentials to the Strapi API. This could lead to unauthorized access or actions performed on behalf of legitimate users, potentially compromising sensitive data or system integrity.

Mitigation Strategies

Upgrade Strapi to version 5.20.0 or later, as this version contains the fix for the CORS misconfiguration vulnerability. No known workarounds exist, so applying the update is the recommended immediate mitigation step.

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