Is CVE-2021-22879 in the CISA KEV catalog?

No. CVE-2021-22879 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-22879?

CVE-2021-22879 has a CVSS v3 base score of 8.8 (HIGH).

What is the EPSS score for CVE-2021-22879?

CVE-2021-22879 has an EPSS score of 4.70% (91th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-22879?

Upgrade nextcloud-desktop on debian 11 to 3.1.1-2 or later.

CVE & CISA-KEV Catalog

CVE-2021-22879

HIGHEPSS 91th pctl

8.8

CVSS v3

NVD

Description

Nextcloud Desktop Client prior to 3.1.3 is vulnerable to resource injection by way of missing validation of URLs, allowing a malicious server to execute remote commands. User interaction is needed for exploitation.

CWE-99 CWE-74Injection

How to fix

Remediation Available

nextcloud-desktopDebian

Fixed in:3.1.1-2CVE-2021-22879

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 InteractionRequired

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

4.70%probability of exploitation in 30 days

91stpercentile

High risk: more likely to be exploited than 91% of all known CVEs.

References

Patch1

github.com

Exploit1

hackerone.com

Vendor Advisory1

nextcloud.com

Third-Party Advisory1

security.gentoo.org

Other references1

lists.fedoraproject.org

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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.