Summary
Go Fiber CSRF Token Validation Vulnerability
A Cross-Site Request Forgery (CSRF) vulnerability has been identified in the application, which allows an attacker to obtain tokens and forge malicious requests on behalf of a user. This can lead to unauthorized actions being taken on the user's behalf, potentially compromising the security and integrity of the application.
Vulnerability Details
The vulnerability is caused by improper validation and enforcement of CSRF tokens within the application. The following issues were identified:
- Lack of Token Association: The CSRF token was validated against tokens in storage but was not tied to the original requestor that generated it, allowing for token reuse.
Defence-in-depth
Users should take additional security measures like captchas or Two-Factor Authentication (2FA) and set Session cookies with SameSite=Lax or SameSite=Strict, and the Secure and HttpOnly attributes.
Impact
A victim's authenticated browser session is used to submit forged requests to an application that cannot distinguish them from legitimate ones. Typical impact: state-changing actions performed as the victim without their consent.
CVE-2023-45141 has a CVSS score of 8.8 (High). The vector is network-reachable, no privileges required, and user interaction required. A CVSS score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether this affects your application depends on whether the vulnerable code is present and reachable in your environment. A fixed version is available (2.50.0); upgrading removes the vulnerable code path.
Affected versions
Security releases
Kodem intelligence
Severity tells you how bad this could be in the worst case. It does not tell you whether you are exposed. Exploitability and impact are functions of runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A vulnerable package can sit in your dependency tree and never run.
Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter. Kodem's runtime-powered SCA identifies whether this CVE is reachable in your applications.
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See it in your environmentNew to Kodem? Get a demo →Remediation advice
To remediate this vulnerability, it is recommended to take the following actions:
Update the Application: Upgrade the application to a fixed version with a patch for the vulnerability.
Implement Proper CSRF Protection: Review the updated documentation and ensure your application's CSRF protection mechanisms follow best practices.
Choose CSRF Protection Method: Select the appropriate CSRF protection method based on your application's requirements, either the Double Submit Cookie method or the Synchronizer Token Pattern using sessions.
Security Testing: Conduct a thorough security assessment, including penetration testing, to identify and address any other security vulnerabilities.
Frequently Asked Questions
- What is CVE-2023-45141? CVE-2023-45141 is a high-severity cross-site request forgery (CSRF) vulnerability in github.com/gofiber/fiber/v2 (go), affecting versions < 2.50.0. It is fixed in 2.50.0. A victim's authenticated browser session is used to submit forged requests to an application that cannot distinguish them from legitimate ones.
- How severe is CVE-2023-45141? CVE-2023-45141 has a CVSS score of 8.8 (High). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.
- Which versions of github.com/gofiber/fiber/v2 are affected by CVE-2023-45141? github.com/gofiber/fiber/v2 (go) versions < 2.50.0 is affected.
- Is there a fix for CVE-2023-45141? Yes. CVE-2023-45141 is fixed in 2.50.0. Upgrade to this version or later.
- Is CVE-2023-45141 exploitable, and should I be worried? Whether CVE-2023-45141 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
- What actually determines whether CVE-2023-45141 is exploitable, and how bad it is? Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
- How do I fix CVE-2023-45141? Upgrade
github.com/gofiber/fiber/v2to 2.50.0 or later.