CVE-2023-27384Network attack vector

Authenticated data alteration via authorization bypass

Published May 23, 2023 · Updated Jan 17, 2025

Incorrect authorization in MultiReport in Cybozu Garoon 5.15.0 allows remote authenticated users to alter MultiReport data. Cybozu and JPCERT/CC have not published the affected request handler or the authorization check that it fails to enforce. A valid login is required, and the documented consequence is limited to unauthorized modification of MultiReport records.

CVSS severity4.3
Medium
EPSS probability0.51%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect authorization in MultiReport in Cybozu Garoon 5.15.0 allows remote authenticated users to alter MultiReport data. Cybozu and JPCERT/CC have not published the affected request handler or the authorization check that it fails to enforce. A valid login is required, and the documented consequence is limited to unauthorized modification of MultiReport records.

The record

CVE
CVE-2023-27384
Published
May 23, 2023
Updated
Jan 17, 2025
Vendor
Cybozu
Product
Garoon
Classifications
CWE-863, CWE-284, T1565.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 23, 2023CVE publishedPublication date reported by the CVE source.
  2. Jan 17, 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=5.15.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Cybozu · Garoonversion=5.15.0

Published CVSS scores

4.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
4.0JPCERT/CCAV:N/AC:L/Au:S/C:N/I:P/A:N
4.3JPCERT/CCCVSS:3.0/AV:N/AC:L/PR:L/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-863Incorrect Authorization
CWE-284Improper Access Control
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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