A logic error in Nextcloud Server 19.0.0 caused a plaintext storage of the share password when it was given on the initial create API call.

published 2020-10-30 6 y ago modified 2026-06-17 4 mo ago also EUVD-2020-29064

cvss: 7.5; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 1.9%; EPSS 1.9% chance of exploitation in 30 days, percentile 79%
public exploits: 0; none known

Patch / fix

fixed in 1 distros 1

nextcloud nextcloud_server 18.0.6, 19.0.1

nextcloud Package Hub 15 SP2, Package Hub 15 SP1, Package Hub 12 +2 more 20.0.0-bp152.2.3.1

opensuse advisories openSUSE-SU-2020:1652-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2020-8183 updated 2025-11-21 cvss 5.0

nextcloud: plaintext storage of password via API call

Red Hat All currently supported Red Hat products
not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

1.91% chance of exploitation in the next 30 days, higher than 79% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

hackerone.com https://hackerone.com/reports/885041 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
NVD	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
NVD	2.0	5.0	AV:N/AC:L/Au:N/C:P/I:N/A:N

Affected products

n/a Nextcloud Server

Classification

Weakness

CWE-256 Plaintext Storage of a Password
CWE-522 Insufficiently Protected Credentials

References

hackerone.com /reports/885041
exploit, third-party-advisory
nextcloud.com /security/advisory/?id=NC-SA-2020-026
broken-link, vendor-advisory

Sources

CVE List CVE-2020-8183
NVD CVE-2020-8183

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary