CVE-2022-31134

Zulip Server public data export contains attachments that are non-public

MEDIUM
4.9
CVSS Score
Published: July 12, 2022 at 08:35 PM UTC
Updated: June 17, 2026 at 04:44 AM UTC
2 products affected across 1 vendorZulip ServerZulip

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Severity
MEDIUM4.9
Exploit prediction
EPSS 0.9%
SSVC
No known exploit

Description

Zulip is an open-source team collaboration tool. Zulip Server versions 2.1.0 above have a user interface tool, accessible only to server owners and server administrators, which provides a way to download a "public data" export. While this export is only accessible to administrators, in many configurations server administrators are not expected to have access to private messages and private streams. However, the "public data" export which administrators could generate contained the attachment contents for all attachments, even those from private messages and streams. Zulip Server version 5.4 contains a patch for this issue.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

2.1.0 ≤ v < 5.4
Affected range stops below 5.4, so it looks safe — our inference, not a vendor statement
v < 5.4
Affected range stops below 5.4, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

4.9MEDIUMGitHub_M
Attack Vector
NETWORK
Complexity
LOW
Privileges
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-200CWE-434

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