GHSA-pgpj-v85q-h5fm Cross-Site Request Forgery on any API call in pyLoad may lead to admin privilege escalation

• PyPI pyload-ng: < 0.5.0b3.dev78 → fixed in 0.5.0b3.dev78

Summary The `pyload` API allows any API call to be made using GET requests. Since the session cookie is not set to `SameSite: strict`, this opens the library up to severe attack possibilities via a Cross-Site Request Forgery (CSRF) attack. This proof of concept shows how an unauthenticated user could trick the administrator's browser into creating a new admin user. PoC We host the following HTML file on an attacker-controlled server. ```html history.pushState('', '', '/'); document.forms[0].submit(); ``` If we now trick an administrator into visiting our malicious page at `https://attacker.com/CSRF.html`, we see that their browser will make a request to `/api/add_user/%22hacker%22,%22hacker%22`, adding a new administrator to the `pyload` application. The attacker can now authenticate as this newly created administrator user with the username `hacker` and password `hacker`. Impact Any API call can be made via a CSRF attack by an unauthenticated user.