CVE-2021-45900

Name: CVE-2021-45900
Creator: NVD / NIST
Published: 2022-03-30T22:15:08.447+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 0.73%

Last modified Jun 17, 2026

CVE-2021-45900 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. 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. EPSS estimates a 0.73% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

6.5/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

EPSS Probability

0.73%

49.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-287

Affected Software

Vendor	Product	Versions
Vivoh	Webinar Manager	< 3.6.3.0

References

https://vivoh.com/blog/finra-remediation/Exploit, Vendor Advisory
https://vivoh.com/wp-content/uploads/2021/11/Vivoh-Webinar-Manager-for-Zoom-Installation-and-Administration-Guide.pdfBroken Link
https://vivoh.com/blog/finra-remediation/Exploit, Vendor Advisory
https://vivoh.com/wp-content/uploads/2021/11/Vivoh-Webinar-Manager-for-Zoom-Installation-and-Administration-Guide.pdfBroken Link

Timeline

Published: Mar 30, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-45900?

How severe is CVE-2021-45900?

CVE-2021-45900 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 0.73% probability of exploitation in the next 30 days.

How do I fix CVE-2021-45900?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-45900?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST