9.1

CVE-2021-32654: nextcloud nextcloud_server

CVSS: 9.1v3.1CriticalModified
Published 01-06-2021Last modified 03-08-2024
Open JSON

Vulnerability summary

CVE-2021-32654 is a critical (CVSS 9.1) vulnerability in nextcloud nextcloud_server. EPSS estimates a 1.85% chance of exploitation in the next 30 days, higher than 78.7% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.1/10
010
Critical · v3.1 (NVD)
EPSS score
1.85%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 01-06-2021
    PublishedVulnerability first disclosed.
  2. 03-08-2024
    Last modifiedVulnerability information updated.

Description

Nextcloud Server is a Nextcloud package that handles data storage. In versions prior to 19.0.11, 20.0.10, and 21.0.2, an attacker is able to receive write/read privileges on any Federated File Share. Since public links can be added as federated file share, this can also be exploited on any public link. Users can upgrade to patched versions (19.0.11, 20.0.10 or 21.0.2) or, as a workaround, disable federated file sharing.

CVSS metrics

3 scores · 2 sources · 2 versions

EPSS trend

Probability

1.85%

Chance of exploitation in the next 30 days

Percentile

79%

Versus all other CVEs

30-day change

0.00 pp

From 1.85% on 18-09-2026

18-09-202618-10-2026
EPSS score
1.85%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Nextcloud2 products

1 vendor · 2 products

References

3 links