Vulnerability in Ctfd Rctf
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.
EPSS: 0.008 (52.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:H/A:N.
Affected products
- Ctfd Rctf
- Redpwn Rctf — versions < 2.3
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Exploit, Third Party Advisory)
- security-advisories@github.com (Exploit, Third Party Advisory, x_refsource_MISC)
Frequently asked questions
- What is CVE-2020-5290?
- CVE-2020-5290 is a medium-severity vulnerability in Ctfd Rctf, classified under Session Fixation. CVSS score: 6.5/10. Published 2020-04-01.
- How severe is CVE-2020-5290?
- Medium severity. CVSS v3 base score is 6.5 out of 10.