← Vulnerability feed

Vulnerability record · CVE-2022-31017 · published 25 June 2022

CVE-2022-31017: Zulip vulnerability

Zulip · Zulip

Zulip is an open-source team collaboration tool. Versions 2.1.0 through and including 5.2 are vulnerable to a logic error. A stream configured as private with protected history, where new subscribers should not be allowed to see messages sent before they were subscribed, when edited causes the server to incorrectly send an API event that includes the edited message to all of the stream’s current subscribers. This API event is ignored by official clients, but can be observed by using a modified client or the browser’s developer tools. This bug will be fixed in Zulip Server 5.3. There are no known workarounds.

2.6 CVSS 3.1 Low EPSS 0.57% · top 55.1% CWE-571 · CWE-571CWE-670 · CWE-670
2.6CVSS 3.1 base score, v2 2.1
0.57%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

Description

Zulip is an open-source team collaboration tool. Versions 2.1.0 through and including 5.2 are vulnerable to a logic error. A stream configured as private with protected history, where new subscribers should not be allowed to see messages sent before they were subscribed, when edited causes the server to incorrectly send an API event that includes the edited message to all of the stream’s current subscribers. This API event is ignored by official clients, but can be observed by using a modified client or the browser’s developer tools. This bug will be fixed in Zulip Server 5.3. There are no known workarounds.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/zulip/zulip/security/advisories/GHSA-m5j3-jp59-6f3q Third Party Advisory
https://github.com/zulip/zulip/security/advisories/GHSA-m5j3-jp59-6f3q Third Party Advisory

Track CVE-2022-31017 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2021-43799Zulip vulnerabilityZulip is an open-source team collaboration tool. Zulip Server installs RabbitMQ for internal message passing. In versions of Zulip Server prior to 4.…EPSS 5.4%8.8CVE-2022-31168Zulip improper authorization vulnerabilityZulip is an open source team chat tool. Due to an incorrect authorization check in Zulip Server 5.4 and earlier, a member of an organization could cr…EPSS 0.80%8.8CVE-2021-3967Zulip improper access control vulnerabilityImproper Access Control in GitHub repository zulip/zulip prior to 4.10.EPSS 0.84%7.5CVE-2016-4427Zulip improper access control vulnerabilityIn zulip before 1.3.12, deactivated users could access messages if SSO was enabled.EPSS 0.75%7.4CVE-2022-24751Zulip race condition vulnerabilityZulip is an open source group chat application. Starting with version 4.0 and prior to version 4.11, Zulip is vulnerable to a race condition during a…EPSS 0.96%6.5CVE-2021-41115Zulip uncontrolled resource consumption vulnerabilityZulip is an open source team chat server. In affected versions Zulip allows organization administrators on a server to configure "linkifiers" that au…EPSS 1.7%6.1CVE-2026-26058Zulip path traversal vulnerabilityZulip is an open-source team collaboration tool. From version 1.4.0 to before version 11.6, ./manage.py import reads arbitrary files from the server …EPSS 0.19%5.7CVE-2022-35962Zulip interpretation conflict vulnerabilityZulip is an open source team chat and Zulip Mobile is an app for iOS and Andriod users. In Zulip Mobile through version 27.189, a crafted link in a m…EPSS 1.1%

Source: NIST National Vulnerability Database (record CVE-2022-31017), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.