CVE-2020-5583Network attack vector

Unauthorized Multi-Report disclosure via access-control bypass

Published Jun 30, 2020 · Updated Aug 4, 2024

Access-control bypass in Cybozu Garoon 4.0.0 through 5.0.1 allows remote authenticated users to read restricted Multi-Report data. Cybozu and JVN identify the affected locus as Multi-Report viewing privileges but do not disclose the request handling or validation error that bypasses them. A valid account is required, and successful exploitation exposes only Multi-Report content outside that account's viewing permissions.

CVSS severity4.3
Medium
EPSS probability1.03%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Access-control bypass in Cybozu Garoon 4.0.0 through 5.0.1 allows remote authenticated users to read restricted Multi-Report data. Cybozu and JVN identify the affected locus as Multi-Report viewing privileges but do not disclose the request handling or validation error that bypasses them. A valid account is required, and successful exploitation exposes only Multi-Report content outside that account's viewing permissions.

The record

CVE
CVE-2020-5583
Published
Jun 30, 2020
Updated
Aug 4, 2024
Vendor
Cybozu
Product
Garoon
Classifications
T1213
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 30, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record 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=4.0.0 to 5.0.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Cybozu · Garoonversion=4.0.0 to 5.0.1

Published CVSS scores

4.3JPCERT/CC and IPA JVNCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
4.0NIST NVDAV:N/AC:L/Au:S/C:P/I:N/A:N
6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
4.0JPCERT/CC and IPA JVNAV:N/AC:L/Au:S/C:P/I:N/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1213Data from Information Repositories

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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