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CVE-2021-30478

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Date: April 14, 2021

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.

Language: C

Severity Score

Related Resources (3)

https://nvd.nist.gov/vuln/detail/CVE-2021-30478
https://blog.zulip.com/2021/04/14/zulip-server-3-4/
https://www.mend.io/vulnerability-database/CVE-2021-30478

Severity Score

Weakness Type (CWE)

Improper Privilege Management

CWE-269

Incorrect Permission Assignment for Critical Resource

CWE-732

Top Fix

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): LOW
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): LOW
Availability (A): NONE

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): LOW
Authentication (AU): SINGLE
Confidentiality (C): NONE
Integrity (I): PARTIAL
Availability (A): NONE
Additional information:

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