Is CVE-2021-32653 in the CISA KEV catalog?

No. CVE-2021-32653 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-32653?

CVE-2021-32653 has a CVSS v3 base score of 2.7 (LOW).

What is the EPSS score for CVE-2021-32653?

CVE-2021-32653 has an EPSS score of 1.21% (65th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-32653?

Upgrade nextcloud server to 21.0.2 or later.

CVE & CISA-KEV Catalog

CVE-2021-32653

LOW

2.7

CVSS v3

NVD

Description

Nextcloud Server is a Nextcloud package that handles data storage. Nextcloud Server versions prior to 19.0.11, 20.0.10, or 21.0.2 send user IDs to the lookup server even if the user has no fields set to published. The vulnerability is patched in versions 19.0.11, 20.0.10, and 21.0.2; no workarounds outside the updates are known to exist.

CWE-201

How to fix

Remediation Available

nextcloud serverNVD

Affected:>= 21.0.0, < 21.0.2Fixed in:21.0.2CVE-2021-32653derived from NVD

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredHigh

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityLow

IntegrityNone

AvailabilityNone

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

Exploit Intelligence

1.21%probability of exploitation in 30 days

65thpercentile

Moderate risk: more likely to be exploited than 65% of all known CVEs.

References

Third-Party Advisory3

Related Vulnerabilities

Other CWE-201 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2025-60188	High	7.5	2.9%	-	-
CVE-2017-16026	Medium	5.9	2.6%	-	Fix
CVE-2017-2582	Medium	6.5	2.5%	-	Fix
CVE-2022-27779	Medium	5.3	2.4%	-	Fix
CVE-2020-26085	Critical	9.9	2.2%	-	Fix
CVE-2024-32825	High	7.5	2.0%	-	-

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.