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Vulnerability record · CVE-2020-8173 · published 2 November 2020

CVE-2020-8173: Nextcloud server missing encryption vulnerability

Nextcloud · Nextcloud Server

A too small set of random characters being used for encryption in Nextcloud Server 18.0.4 allowed decryption in shorter time than intended.

2.2 CVSS 3.1 Low EPSS 0.37% · top 71.8% CWE-310 · CWE-310CWE-311 · Missing encryption
2.2CVSS 3.1 base score, v2 3.5
0.37%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

A too small set of random characters being used for encryption in Nextcloud Server 18.0.4 allowed decryption in shorter time than intended.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://hackerone.com/reports/852841 ExploitThird Party Advisory
https://nextcloud.com/security/advisory/?id=NC-SA-2020-023 Broken LinkVendor Advisory
https://hackerone.com/reports/852841 ExploitThird Party Advisory
https://nextcloud.com/security/advisory/?id=NC-SA-2020-023 Broken LinkVendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2020-8173), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.