Language: Go
Label: vulnerable
CWE: CWE-565 \u2014 Reliance on Cookies without Validation and Integrity Checking
The product relies on the existence or values of cookies when performing security-critical operations, but it does not properly ensure that the setting is valid for the associated user.

Code:
func CsrfFromParam(param string) func(c *fiber.Ctx) (string, error) {
	return func(c *fiber.Ctx) (string, error) {
		token := c.Params(param)
		if token == "" {
			return "", errMissingParam
		}
		return token, nil
	}
}