Vulnerability: CVE-2020-5290

In RedpwnCTF before version 2.3, there is a session fixation vulnerability in exploitable through the `#token=$ssid` hash when making a request to the `/verify` endpoint. An attacker team could potentially steal flags by, for example, exploiting a stored XSS payload in a CTF challenge so that victim teams who solve the challenge are unknowingly (and against their will) signed into the attacker team's account. Then, the attacker can gain points / value off the backs of the victims. This is patched in version 2.3.


https://github.com/redpwn/rctf/security/advisories/GHSA-p5fh-2vhw-fvpq
https://github.com/redpwn/rctf/issues/147
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-5290


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