What is CVE-2023-45128?

CVE-2023-45128 is a critical-severity vulnerability in Gofiber Fiber, classified under Improper Input Validation. CVSS score: 10.0/10. Published 2023-10-16.

How severe is CVE-2023-45128?

Critical severity. CVSS v3 base score is 10.0 out of 10.

Is CVE-2023-45128 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

CSRF in Gofiber Fiber

CVE-2023-45128

Fiber is an express inspired web framework written in Go. A Cross-Site Request Forgery (CSRF) vulnerability has been identified in the application, which allows an attacker to inject arbitrary values and forge malicious requests on behalf of a user. This vulnerability can allow an attacker to inject arbitrary values without any authentication, or perform various malicious actions on behalf of an authenticated user, potentially compromising the security and integrity of the application. The vulnerability is caused by improper validation and enforcement of CSRF tokens within the application. This issue has been addressed in version 2.50.0 and users are advised to upgrade. Users should take additional security measures like captchas or Two-Factor Authentication (2FA) and set Session cookies with SameSite=Lax or SameSite=Secure, and the Secure and HttpOnly attributes as defense in depth measures. There are no known workarounds for this vulnerability.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

Published 2023-10-16 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 10.0 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:L.

EPSS exploit prediction

EPSS: 0.003 (21.8th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 22nd percentile — 21.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000

Affected products

Gofiber Fiber — versions < 2.50.0

Weakness classification (CWE)

Public proof-of-concept exploits

sixcolors/fiber-csrf-cve-test

References

github.com/gofiber/fiber/security/advisories/GHSA-94w9-97p3-p368 (Mitigation, Vendor Advisory)
github.com/gofiber/fiber/commit/8c3916dbf4ad2ed427d02c6eb63ae8b2fa8f019a (Patch)

Frequently asked questions

What is CVE-2023-45128?: CVE-2023-45128 is a critical-severity vulnerability in Gofiber Fiber, classified under Improper Input Validation. CVSS score: 10.0/10. Published 2023-10-16.
How severe is CVE-2023-45128?: Critical severity. CVSS v3 base score is 10.0 out of 10.
Is CVE-2023-45128 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.