Read the docs
TI-2022-08565 Aliases CVE-2022-24751

Race condition in Zulip

Priority LOW 34CWE-362Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
High
Impact type
—
Confidentiality · integrity · availability
High · High · None
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA.

Summary

Zulip 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 account deactivation, where a simultaneous access by the user being deactivated may, in rare cases, allow continued access by the deactivated user. A patch is available in version 4.11 on the 4.x branch and version 5.0-rc1 on the 5.x branch. Upgrading to a fixed version will, as a side effect, deactivate any cached sessions that may have been leaked through this bug. There are currently no known workarounds.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00955 61st percentileScored 2026-11-07
Fix Fixed zulip (zulip): 4.11

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
zulipzulip4.0 to before 4.114.11Patch availableCNA
  • zulip Vendorzulip Affected 4.0 to before 4.11 Fixed in 4.11 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:zulip:zulip:*:*:*:*:*:*:*:*4.0 to before 4.11Vulnerablezulip
  • cpe:2.3:a:zulip:zulip:*:*:*:*:*:*:*:* Versions 4.0 to before 4.11 Vulnerable ·zulip

Remediation

  • Fix · CNA zulip (zulip) Fixed in 4.11

Timeline

  1. 2026-10-02 Threatist record created from CVE-2022-24751

References

Patch 2

Advisory 1

  • TI-2026-20810 Zulip: Anonymous File Access After Disabling Spectator Access CVSS 3.1MEDIUM 5.3
  • TI-2026-21062 Zulip: Path Traversal in Import CVSS 3.1MEDIUM 6.1
  • TI-2021-19605 RabbitMQ exposes ports with weak default secrets in Zulip Server CVSS 3.1CRITICAL 9.8
  • TI-2023-15953 Users who can send invitations can erroneously add users to streams during invitation in Zulip CVSS 3.1LOW 3.1
  • TI-2022-13210 Zulip Server insufficient authorization for changing bot roles CVSS 3.1HIGH 8.8
  • TI-2021-02864 Improper Access Control in zulip/zulip CVSS 3.1HIGH 8.8
See all 19 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences