{"id":"CVE-2020-5290","aliases":["EUVD-2020-26484"],"status":"published","title":"session fixation in rCTF","description":"In RedpwnCTF before version 2.3, there is a session fixation vulnerability in exploitable through the `#token=$ssid` hash when making a request to the `/verify` endpoint. An attacker team could potentially steal flags by, for example, exploiting a stored XSS payload in a CTF challenge so that victim teams who solve the challenge are unknowingly (and against their will) signed into the attacker team\u0026#39;s account. Then, the attacker can gain points / value off the backs of the victims. This is patched in version 2.3.","severity":{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:H/A:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00816,"percentile":0.57396,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-384"],"published":"2020-04-01T19:25:15Z","modified":"2026-06-17T03:21:12Z","products":[{"vendor":"ctfd","product":"rctf"},{"vendor":"redpwn","product":"rctf"}],"references":[{"url":"https://github.com/redpwn/rctf/security/advisories/GHSA-p5fh-2vhw-fvpq","tags":["x_refsource_CONFIRM","x_transferred","Exploit","Third Party Advisory"]},{"url":"https://github.com/redpwn/rctf/issues/147","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory"]}],"sources":{"cve":[{"id":"CVE-2020-5290","title":"session fixation in rCTF","description":"In RedpwnCTF before version 2.3, there is a session fixation vulnerability in exploitable through the `#token=$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\u0026#39;s account. Then, the attacker can gain points / value off the backs of the victims. This is patched in version 2.3.","status":"published","published":"2020-04-01T19:25:15Z","modified":"2024-08-04T08:22:09.09Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:H/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-384"],"updated_at":"2026-11-02T14:35:47.22408Z"}],"euvd":[{"id":"EUVD-2020-26484","description":"In RedpwnCTF before version 2.3, there is a session fixation vulnerability in exploitable through the `#token=$ssid` hash when making a request to the `/verify` endpoint. An attacker team could potentially steal flags by, for example, exploiting a stored XSS payload in a CTF challenge so that victim teams who solve the challenge are unknowingly (and against their will) signed into the attacker team\u0026#39;s account. Then, the attacker can gain points / value off the backs of the victims. This is patched in version 2.3.","status":"published","published":"2020-04-01T19:25:15Z","modified":"2024-08-04T08:22:09Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:H/A:N","level":"medium"}],"updated_at":"2026-11-03T03:08:07.28588Z"}],"nvd":[{"id":"CVE-2020-5290","description":"In RedpwnCTF before version 2.3, there is a session fixation vulnerability in exploitable through the `#token=$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\u0026#39;s account. Then, the attacker can gain points / value off the backs of the victims. This is patched in version 2.3.","status":"published","published":"2020-04-01T20:15:15.223Z","modified":"2026-06-17T03:21:12.74Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:H/A:N","level":"medium","assessor":"secondary"},{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N","level":"medium","assessor":"primary"},{"version":"2.0","score":4.3,"vector":"AV:N/AC:M/Au:N/C:N/I:P/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-384"],"updated_at":"2026-11-02T14:05:57.678762Z"}]}}