CVE-2025-30369Network attack vector

Cross-organization field deletion via missing ownership check

Published Mar 31, 2025 · Updated Mar 31, 2025

Authorization bypass in Zulip Server 1.6.0 through 10.0 allows remote authenticated users to delete other organizations' profile fields. The deletion API handler accepts a user-controlled field ID and deletes the matching database record without verifying that its organization matches the caller's organization. Exploitation requires administrator rights in any organization and a multi-organization server; single-organization installations with default-disabled realm creation are not exposed.

CVSS severity2.7
Low
EPSS probability0.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authorization bypass in Zulip Server 1.6.0 through 10.0 allows remote authenticated users to delete other organizations' profile fields. The deletion API handler accepts a user-controlled field ID and deletes the matching database record without verifying that its organization matches the caller's organization. Exploitation requires administrator rights in any organization and a multi-organization server; single-organization installations with default-disabled realm creation are not exposed.

The record

CVE
CVE-2025-30369
Published
Mar 31, 2025
Updated
Mar 31, 2025
Vendor
Zulip
Product
Zulip
Classifications
CWE-566, T1565.001
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Mar 31, 2025CVE publishedPublication date reported by the CVE source.
  2. Mar 31, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>= 1.6.0, < 10.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Zulip · Zulipversion=>= 1.6.0, < 10.1

Published CVSS scores

2.7GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-566Authorization Bypass Through User-Controlled SQL Primary Key
T1565.001Stored Data Manipulation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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