CVE-2020-8150

Name: CVE-2020-8150
Creator: NVD / NIST
Published: 2020-11-09T15:15:13.443+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 4.1/10EPSS 0.29%

Last modified Jun 17, 2026

CVE-2020-8150 is a medium-severity vulnerability rated 4.1/10 on the CVSS scale. A cryptographic issue in Nextcloud Server 19.0.1 allowed an attacker to downgrade the encryption scheme and break the integrity of encrypted files.. EPSS estimates a 0.29% chance of exploitation in the next 30 days.

Description

A cryptographic issue in Nextcloud Server 19.0.1 allowed an attacker to downgrade the encryption scheme and break the integrity of encrypted files.

Metrics

CVSS 3.1

4.1/10

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

EPSS Probability

0.29%

20.3th 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

http://seclists.org/fulldisclosure/2020/Dec/55Mailing List, Third Party Advisory
http://seclists.org/fulldisclosure/2020/Dec/57Mailing List, Third Party Advisory
http://seclists.org/fulldisclosure/2020/Dec/58Mailing List, Third Party Advisory
https://hackerone.com/reports/742588Exploit, Third Party Advisory
https://nextcloud.com/security/advisory/?id=NC-SA-2020-039Vendor Advisory
http://seclists.org/fulldisclosure/2020/Dec/55Mailing List, Third Party Advisory
http://seclists.org/fulldisclosure/2020/Dec/57Mailing List, Third Party Advisory
http://seclists.org/fulldisclosure/2020/Dec/58Mailing List, Third Party Advisory
https://hackerone.com/reports/742588Exploit, Third Party Advisory
https://nextcloud.com/security/advisory/?id=NC-SA-2020-039Vendor Advisory

Timeline

Published: Nov 9, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-8150?

A cryptographic issue in Nextcloud Server 19.0.1 allowed an attacker to downgrade the encryption scheme and break the integrity of encrypted files.

How severe is CVE-2020-8150?

CVE-2020-8150 has a CVSS score of 4.1/10 (MEDIUM severity). The EPSS model estimates a 0.29% probability of exploitation in the next 30 days.

How do I fix CVE-2020-8150?

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-2020-8150?

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

Scan your code now

Source: NVD / NIST