session fixation in rCTF
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- Required
- Attack complexity
- High
- Impact type
- Spoofing
- Confidentiality · integrity · availability
- Low · High · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-384.
Summary
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.
Why it matters now
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| redpwn | rctf | before 2.3 | 2.3 | Patch available | CNA |
- rctf Vendorredpwn Affected before 2.3 Fixed in 2.3 Patch available CNA
Remediation
- Fix · CNA rctf (redpwn) Fixed in 2.3
Timeline
- 2026-10-02 Threatist record created from CVE-2020-5290
References
Sources
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences