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Fencer Vulns
medium 5.5

CVE-2021-32801 json

Exceptions may have logged Encryption-at-Rest key content in Nextcloud server

published 2021-09-07 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-19561

cvss
5.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 15%
public exploits
0
none known

Summary

Nextcloud server is an open source, self hosted personal cloud. In affected versions logging of exceptions may have resulted in logging potentially sensitive key material for the Nextcloud Encryption-at-Rest functionality. It is recommended that the Nextcloud Server is upgraded to 20.0.12, 21.0.4 or 22.1.0. If upgrading is not an option users are advised to disable system logging to resolve this issue until such time that an upgrade can be performed Note that ff you do not use the Encryption-at-Rest functionality of Nextcloud you are not affected by this bug.

Patch / fix

  • nextcloud nextcloud_server 20.0.12, 21.0.4, 22.1.0
  • nextcloud Package Hub 15 SP2 20.0.12-bp152.2.12.1
  • nextcloud Package Hub 15 SP3, openSUSE Leap 15.3 20.0.12-bp153.2.6.1
  • nextcloud openSUSE Leap 15.2 20.0.12-lp152.3.12.1
  • nextcloud Package Hub 12 20.0.12-31.1
  • nextcloud Package Hub 15 SP1 20.0.12-bp151.3.18.1

opensuse advisories openSUSE-SU-2021:1275-1openSUSE-SU-2021:1255-1openSUSE-SU-2021:1253-1openSUSE-SU-2021:1252-1openSUSE-SU-2021:1250-1

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-2021-32801 updated cvss 5.5

nextcloud: information disclosure possible when logging

  • 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

0.24% chance of exploitation in the next 30 days, higher than 15% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
NVD 3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
NVD 2.0 2.1 AV:L/AC:L/Au:N/C:P/I:N/A:N

Affected products

  • nextcloud security-advisories

Classification

Weakness
  • CWE-532 Insertion of Sensitive Information into Log File

References

Sources

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.