CVE-2018-16495 json
In VOS user session identifier (authentication token) is issued to the browser prior to authentication but is not changed after the user su…
published 2021-05-26 5 y ago modified 2026-06-17 4 mo ago also EUVD-2018-8306
- cvss
- 8.8
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.9%
- EPSS 0.9% chance of exploitation in 30 days, percentile 60%
- public exploits
- 0
- none known
Summary
In VOS user session identifier (authentication token) is issued to the browser prior to authentication but is not changed after the user successfully logs into the application. Failing to issue a new session ID following a successful login introduces the possibility for an attacker to set up a trap session on the device the victim is likely to login with.
Patch / fix
- versa-networks versa_operating_system 16.1r2s11, 20.2.2, 21.1.1
Exploit prediction
0.91% chance of exploitation in the next 30 days, higher than 60% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 8.8 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 6.5 | AV:N/AC:L/Au:S/C:P/I:P/A:P |
Affected products
- n/a Versa VOS
Classification
- Weakness
-
- CWE-384 Session Fixation
References
-
hackerone.com
/reports/1168192
third-party-advisory
Sources
- CVE List CVE-2018-16495
- NVD CVE-2018-16495
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