CVE-2021-45900

MEDIUM 6.5CVE-2021-45900 · Published 30/03/2022 · updated 17/06/2026

In short

CVE-2021-45900 is a MEDIUM (CVSS 6.5) vulnerability affecting webinar manager (vivoh).
Chance of exploitation in the next 30 days (EPSS): 0.74%, higher than 54.8% of all vulnerabilities.
Fix: update to 3.6.3.0 or later.

Package	Affected versions	Patched versions
webinar manager vivoh	`< 3.6.3.0`	`3.6.3.0`

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.

References

vivoh.com/blog/finra-remediation · Exploit
vivoh.com/wp-content/uploads/2021/11/Vivoh-Webinar-Manager-for-Zoom-Installation-and-Administration-Guide.pdf · Broken Link

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