Is CVE-2021-3967 in the CISA KEV catalog?

No. CVE-2021-3967 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-3967?

CVE-2021-3967 has a CVSS v3 base score of 8.8 (HIGH).

What is the EPSS score for CVE-2021-3967?

CVE-2021-3967 has an EPSS score of 0.83% (53th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-3967?

Upgrade zulip to 4.10 or later.

CVE & CISA-KEV Catalog

CVE-2021-3967

HIGH

8.8

CVSS v3

NVD

Description

Improper Access Control in GitHub repository zulip/zulip prior to 4.10.

CWE-284Improper Access Control

How to fix

Remediation Available

zulipNVD

Affected:< 4.10Fixed in:4.10CVE-2021-3967derived 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 RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

0.83%probability of exploitation in 30 days

53rdpercentile

Moderate risk: more likely to be exploited than 53% of all known CVEs.

References

Patch1

github.com

Exploit1

huntr.dev

Related Vulnerabilities

Other CWE-284 (Improper Access Control) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2023-27350	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2019-1653	High	7.5	100%	KEV	-
CVE-2023-23752	Medium	5.3	100%	KEV	Fix
CVE-2023-29298	High	7.5	100%	KEV	-
CVE-2023-38205	High	7.5	100%	KEV	-
CVE-2024-27348	Critical	9.8	99%	KEV	Fix

Embed a live status badge for CVE-2021-3967

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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.