CVE-2021-42761
Last modified
CVE-2021-42761 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. A condition for session fixation vulnerability [CWE-384] in the session management of FortiWeb versions 6.4 all versions, 6.3.0 through 6.3.16, 6.2.0 through 6.2.6, 6.1.0 through 6.1.2, 6.0.0 through 6.0.7, 5.9.0 through 5.9.1 may allow a remote, unauthenticated attacker to infer the session identifier of other users and possibly usurp their session.. EPSS estimates a 1.47% chance of exploitation in the next 30 days.
Description
A condition for session fixation vulnerability [CWE-384] in the session management of FortiWeb versions 6.4 all versions, 6.3.0 through 6.3.16, 6.2.0 through 6.2.6, 6.1.0 through 6.1.2, 6.0.0 through 6.0.7, 5.9.0 through 5.9.1 may allow a remote, unauthenticated attacker to infer the session identifier of other users and possibly usurp their session.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Fortinet | Fortiweb | >= 5.6.0, < 5.9.2 |
| Fortinet | Fortiweb | >= 6.0.0, < 6.0.8 |
| Fortinet | Fortiweb | >= 6.1.0, < 6.1.3 |
| Fortinet | Fortiweb | >= 6.2.0, < 6.2.7 |
| Fortinet | Fortiweb | >= 6.3.0, < 6.3.17 |
| Fortinet | Fortiweb | >= 6.4.0, < 7.0.0 |
References
- https://fortiguard.com/psirt/FG-IR-21-214Vendor Advisory
- https://fortiguard.com/psirt/FG-IR-21-214Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
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How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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