CVE-2021-45900

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.7% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2022-03-30 · updated 2026-06-17
Weakness: CWE-287

Description

Vivoh Webinar Manager before 3.6.3.0 has improper API authentication. When a user logs in to the administration configuration web portlet, a VIVOH_AUTH cookie is assigned so that they can be uniquely identified. Certain APIs can be successfully executed without proper authentication. This can let an attacker impersonate as victim and make state changing requests on their behalf.

Affected products

Vivoh Webinar Manager: before 3.6.3.0 — fixed in 3.6.3.0

How to fix

Upgrade to a fixed version: Vivoh Webinar Manager 3.6.3.0. Check the vendor advisory for mitigations.

References

https://vivoh.com/blog/finra-remediation/
https://vivoh.com/wp-content/uploads/2021/11/Vivoh-Webinar-Manager-for-Zoom-Installation-and-Administration-Guide.pdf
https://vivoh.com/blog/finra-remediation/
https://vivoh.com/wp-content/uploads/2021/11/Vivoh-Webinar-Manager-for-Zoom-Installation-and-Administration-Guide.pdf

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