GHSA-fmg4-x8pw-hjhg · Severity: critical · Ecosystem: go — Fiber has Insecure CORS Configuration, Allowing Wildcard Origin with Credentials
Fiber is a web framework written in go. Prior to version 2.52.1, the CORS middleware allows for insecure configurations that could potentially expose the application to multiple CORS-related vulnerabilities. Specifically, it allows setting the Access-Control-Allow-Origin header to a wildcard (`*`) while also having the Access-Control-Allow-Credentials set to true, which goes against recommended security best practices. The impact of this misconfiguration is high as it can lead to unauthorized access to sensitive user data and expose the system to various types of attacks listed in the PortSwigger article linked in the references. Version 2.52.1 contains a patch for this issue. As a workaround, users may manually validate the CORS configurations in their implementation to ensure that they do not allow a wildcard origin when credentials are enabled. The browser fetch api, as well as browsers and utilities that enforce CORS policies, are not affected by this.
Conclusion & alert: CVE-2024-25124 is rated High Exploit Risk (75.6/100): CVSS Critical severity, with medium exploitation likelihood (EPSS 0.50%). Core evidence: 2 public exploit reference(s) are indexed (Exploit-DB). Mandatory action: Public exploits are available—assess exposure, apply mitigations, and prioritize patching.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
| EDB-ID | Source | Kind | Published | Link |
|---|---|---|---|---|
| — | nvd_ref | exploit_tag | Exploit-DB ↗ | |
| — | nvd_ref | exploit_tag | Exploit-DB ↗ |
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2026-04-28 | 0.56% | 0.50% | -0.06% |
| 2 | 2026-04-23 | 0.48% | 0.56% | +0.07% |
| 3 | 2026-03-11 | — | 0.48% | — |
Full EPSS history (13 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 9.4 | 3.1 | CRITICAL |
|
3.9 | 5.5 | [email protected] |
| 9.8 | 3.1 | CRITICAL |
|
3.9 | 5.9 | [email protected] |
GHSA-fmg4-x8pw-hjhg · Severity: critical · Ecosystem: go — Fiber has Insecure CORS Configuration, Allowing Wildcard Origin with Credentials
| URL | Tags |
|---|---|
| http://blog.portswigger.net/2016/10/exploiting-cors-misconfigurations-for.html | Exploit Third Party Advisory |
| https://codeql.github.com/codeql-query-help/javascript/js-cors-misconfiguration-for-credentials | Technical Description |
| https://developer.mozilla.org/en-US/docs/Web/HTTP/CORS/Errors/CORSNotSupportingCredentials | Technical Description |
| https://fetch.spec.whatwg.org/#cors-protocol-and-credentials | Technical Description |
| https://github.com/gofiber/fiber/commit/f0cd3b44b086544a37886232d0530601f2406c23 | Patch |
| https://github.com/gofiber/fiber/releases/tag/v2.52.1 | Release Notes |
| https://github.com/gofiber/fiber/security/advisories/GHSA-fmg4-x8pw-hjhg | Exploit Vendor Advisory |
| https://saturncloud.io/blog/cors-cannot-use-wildcard-in-accesscontrolalloworigin-when-credentials-flag-is-true | Broken Link |