CVE-2020-8236

Name: CVE-2020-8236
Creator: NVD / NIST
Published: 2020-11-02T21:15:34.867+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.8/10EPSS 0.58%

Last modified Jun 17, 2026

CVE-2020-8236 is a medium-severity vulnerability rated 6.8/10 on the CVSS scale. A wrong configuration in Nextcloud Server 19.0.1 incorrectly made the user feel the passwordless WebAuthn is also a two factor verification by asking for the PIN of the passwordless WebAuthn but not verifying it.. EPSS estimates a 0.58% chance of exploitation in the next 30 days.

Description

A wrong configuration in Nextcloud Server 19.0.1 incorrectly made the user feel the passwordless WebAuthn is also a two factor verification by asking for the PIN of the passwordless WebAuthn but not verifying it.

Metrics

CVSS 3.1

6.8/10

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

EPSS Probability

0.58%

43.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Nextcloud	Nextcloud Server	< 19.0.2

References

https://hackerone.com/reports/924393Exploit, Third Party Advisory
https://nextcloud.com/security/advisory/?id=NC-SA-2020-037Broken Link, Vendor Advisory
https://hackerone.com/reports/924393Exploit, Third Party Advisory
https://nextcloud.com/security/advisory/?id=NC-SA-2020-037Broken Link, Vendor Advisory

Timeline

Published: Nov 2, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-8236?

How severe is CVE-2020-8236?

CVE-2020-8236 has a CVSS score of 6.8/10 (MEDIUM severity). The EPSS model estimates a 0.58% probability of exploitation in the next 30 days.

How do I fix CVE-2020-8236?

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-2020-8236?

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

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Source: NVD / NIST