Is CVE-2021-32703 in the CISA KEV catalog?

No. CVE-2021-32703 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-32703?

CVE-2021-32703 has a CVSS v3 base score of 5.3 (MEDIUM).

What is the EPSS score for CVE-2021-32703?

CVE-2021-32703 has an EPSS score of 1.51% (71th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-32703?

Upgrade nextcloud server to 21.0.3 or later.

CVE & CISA-KEV Catalog

CVE-2021-32703

MEDIUMEPSS 71th pctl

5.3

CVSS v3

NVD

Description

Nextcloud Server is a Nextcloud package that handles data storage. In versions prior to 19.0.13, 20.011, and 21.0.3, there was a lack of ratelimiting on the shareinfo endpoint. This may have allowed an attacker to enumerate potentially valid share tokens. The issue was fixed in versions 19.0.13, 20.0.11, and 21.0.3. There are no known workarounds.

CWE-799 CWE-307

How to fix

Remediation Available

nextcloud serverNVD

Affected:>= 21.0.0, < 21.0.3Fixed in:21.0.3CVE-2021-32703derived from NVD

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 RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityLow

AvailabilityNone

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

Exploit Intelligence

1.51%probability of exploitation in 30 days

71stpercentile

Elevated risk: more likely to be exploited than 71% of all known CVEs.

References

Patch1

github.com

Third-Party Advisory2

Other references3

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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.