Description
Nagios Fusion v2024R1.2 and v2024R2 does not invalidate already existing session tokens when the two-factor authentication mechanism is enabled, allowing attackers to perform a session hijacking attack.
Affected products
nagios: fusion
References3
- github.com/aakashtyal/Session-Persistence-After-Enabling-2FA MitigationThird Party Advisory
- github.com/aakashtyal/Session-Persistence-After-Enabling-2FA-CV… MitigationThird Party Advisory
- www.nagios.com/changelog/#fusion Release Notes
Metrics
- CVSS 3.1
-
8.6
HIGH
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L - EPSS — exploit probability
- 1% percentile: 63 · as of 10 November 2026
- CWE
- CWE-491
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.