What is CVE-2021-30478?

CVE-2021-30478 is a medium-severity vulnerability in Zulip Server, classified under Improper Privilege Management. CVSS score: 4.3/10. Published 2021-04-15.

How severe is CVE-2021-30478?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Privilege escalation in Zulip Server

CVE-2021-30478

An issue was discovered in Zulip Server before 3.4. A bug in the implementation of the can_forge_sender permission (previously is_api_super_user) resulted in users with this permission being able to send messages appearing as if sent by a system bot, including to other organizations hosted by the same Zulip installation.

Vulnerability class: Privilege Escalation

EPSS: 0.006 (44.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N.

Affected products

Zulip Zulip_server
N/a — versions n/a

Weakness classification (CWE)

CWE-269 — Improper Privilege Management

References

cve@mitre.org (x_refsource_MISC, Release Notes, Vendor Advisory)

Frequently asked questions

What is CVE-2021-30478?: CVE-2021-30478 is a medium-severity vulnerability in Zulip Server, classified under Improper Privilege Management. CVSS score: 4.3/10. Published 2021-04-15.
How severe is CVE-2021-30478?: Medium severity. CVSS v3 base score is 4.3 out of 10.