FiberApplication · Gofiber
CVE-2023-45141
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedFiber 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 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. The vulnerability is caused by improper validation and enforcement of CSRF tokens within the application. This vulnerability 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.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · high confidenceCSRF vulnerability in the Fiber Go web framework caused by improper validation and enforcement of CSRF tokens. Attackers can obtain tokens and forge malicious requests on behalf of authenticated users, leading to unauthorized actions.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data
FiberApplication
< 2.50.0CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- None
- User interaction
- Required
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Identify installed Fiber versionCheck your go.mod file for the fiber package version, or run 'go list -m github.com/gofiber/fiber' in your project directoryAffected if The version listed is below 2.50.0 (e.g., 2.49.0, 2.48.0, etc.)
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Verify CSRF middleware is in useSearch your codebase for imports of 'github.com/gofiber/csrf' and usage of app.Use(csrf.New()) or similar CSRF middleware initializationAffected if CSRF middleware is implemented in your application
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Inspect CSRF middleware configurationExamine the csrf.New() call in your code - look for the Config struct and check if TokenLength, TokenLookup, or CookieName settings are explicitly definedAffected if CSRF middleware is present with default or minimal configuration (no custom TokenLength, weak TokenLookup, or missing session handling)
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Review CSRF cookie attributesCheck the Cookie field in your CSRF config for SameSite, Secure, and HttpOnly attributes - look for missing or insecure settings like SameSite: "" or SameSite: "Lax" without Secure flag in productionAffected if SameSite attribute is set to empty string, "None", or Lax without proper Secure flags, or HttpOnly is false
You are affected if you are running Fiber version below 2.50.0 and have CSRF middleware enabled with default or weak token validation configuration.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
dbcve · scoped2.50.0
Upgrade to Fiber version 2.50.0 or later, configure CSRF middleware with proper token validation, and set cookie attributes (SameSite=Lax/Secure, Secure, HttpOnly). Consider adding captchas or 2FA for sensitive operations.
v2.50.0
- Check your current Fiber version by reviewing your go.mod file or running `go list -m all`
- Run `go get github.com/gofiber/fiber/[email protected]` to upgrade to the fixed release
- Verify the upgrade was successful by running `go list -m github.com/gofiber/fiber/v2` and confirming it shows v2.50.0
- Run `go mod tidy` to update dependencies
- Rebuild and test your application to ensure compatibility
- Implement additional security measures: set Session cookies with SameSite=Lax or SameSite=Secure, and include Secure and HttpOnly attributes
- Consider adding captchas or Two-Factor Authentication (2FA) for sensitive operations as recommended
Generated from the published advisory — verify against the referenced sources before acting.
Fix this in Fiber
Scoped from the published advisory
- Consultation3.0 h
- Implementation6.0 h
- Testing5.0 h
- Review / QA3.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $4,752.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2023-45141 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2023-45141 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
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