id: GO-2020-0049
modules:
    - module: github.com/justinas/nosurf
      versions:
        - fixed: 1.1.1
      vulnerable_at: 1.1.0
      packages:
        - package: github.com/justinas/nosurf
          symbols:
            - VerifyToken
            - verifyToken
          derived_symbols:
            - CSRFHandler.ServeHTTP
summary: Improper input validation in github.com/justinas/nosurf
description: |-
    Due to improper validation of caller input, validation is silently disabled if
    the provided expected token is malformed, causing any user supplied token to be
    considered valid.
published: 2021-04-14T20:04:52Z
ghsas:
    - GHSA-5x84-q523-vvwr
credits:
    - '@aeneasr'
references:
    - fix: https://github.com/justinas/nosurf/pull/60
    - fix: https://github.com/justinas/nosurf/commit/4d86df7a4affa1fa50ab39fb09aac56c3ce9c314
cve_metadata:
    id: CVE-2020-36564
    cwe: 'CWE 345: Insufficient Verification of Data Authenticity'