Vulnerability · Published Apr 14, 2021 · Assigned by mitre

CVE-2021-30478

Medium 4.3

In plain English

A medium-severity security flaw in the affected software. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 48% of all known vulnerabilities).

Severity (CVSS NVD)4.3Medium

Exploit odds (30 days)0.6%top 52.4% of all CVEs

Exploited in the wildNo reportsnot in CISA KEV

Attack toolingNoneno public tooling known

Official description

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.

Affected products (as reported)

Vendor	Product	Versions
n/a	n/a	n/a

References

https://blog.zulip.com/2021/04/14/zulip-server-3-4/ x_refsource_MISC