Vulnerability in Zulip

CVE-2021-3967

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

EPSS: 0.008 (53.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Weakness classification (CWE)

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2021-3967?
CVE-2021-3967 is a high-severity vulnerability in Zulip, classified under Improper Access Control. CVSS score: 8.8/10. Published 2022-02-26.
How severe is CVE-2021-3967?
High severity. CVSS v3 base score is 8.8 out of 10.
Is CVE-2021-3967 known to be exploited?
2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.