usd-2020-0053 | Gophish v0.10.1

Advisory ID: usd-2020-0053
CVE Number: CVE-2020-24713
Affected Product: Gophish
Affected Version: v0.10.1
Vulnerability Type: Insufficient Session Expiration
Security Risk: High
Vendor URL:
Vendor Status: Fix scheduled


The client’s session cookie “gophish” doesn’t get invalidated on the server side upon logout. A new cookie is sent to the client however the old session cookie can be used for browsing the settings page and to retrieve the API key.

Proof of Concept (PoC)

A user’s session is not invalidated on the server-side upon logout. Hence, it is possible to continue browsing pages using the old session and a web application proxy such as Burp. The following screenshot illustrates how an HTTP request containing a logged out session returns the same response as if the session’s owner was still logged in.

  1. Logout using /logout
  2. Replay previously captured request to /settings (including old cookie) – observe that the session was not invalidated server-side


Upon logout, user sessions should be terminated both client and server side.


  • 2020-06-18 First contact request via
  • 2020-06-22 Vendor responds to initial contact
  • 2020-08-20 Vendor accepts the risk of publication while waiting for the underlying authentication library to fix the issue
  • 2020-09-29 Security advisory released


This security vulnerability was found by Marcus Nilsson of usd AG.


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to usd AG

In accordance with usd AG’s Responsible Disclosure Policy, all vendors have been notified of the existence of these vulnerabilities.


The information provided in this security advisory is provided „as is“ and without warranty of any kind. Details of this security advisory may be updated in order to provide as accurate information as possible.