HOMEVULNERABILITIESCVE-2020-5567
HIGH

CVE-2020-5567

CWE-287Published: April 28, 2020· Updated: Jun 17, 2026

7.5
CVSS v3.1

Official Description

Improper authentication vulnerability in Cybozu Garoon 4.0.0 to 4.10.3 allows remote attackers to obtain data in Application Menu.

NVD Source

Technical Analysis

CVE-2020-5567 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), with a CVSS base score of 7.5.

From a weakness classification perspective (CWE-287): Authentication bypass vulnerabilities allow attackers to access protected resources without valid credentials.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityNone
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected Vendors & Products

cybozu1 product(s)
garoon
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://jvn.jp/en/jp/JVN35649781/index.html
ADVISORYhttps://kb.cybozu.support/article/36114/
ADVISORYhttps://jvn.jp/en/jp/JVN35649781/index.html
ADVISORYhttps://kb.cybozu.support/article/36114/

All References (4)

→
https://jvn.jp/en/jp/JVN35649781/index.htmlThird Party Advisory
→
https://kb.cybozu.support/article/36114/Vendor Advisory
→
https://jvn.jp/en/jp/JVN35649781/index.htmlThird Party Advisory
→
https://kb.cybozu.support/article/36114/Vendor Advisory

Quick Facts

CVE IDCVE-2020-5567
CVSS Score7.5 / 10
SeverityHIGH
WeaknessCWE-287
CISA KEVNo
Affected1 vendor(s)
PublishedApr 28, 2020

Related CVEs (CWE-287)

CVE-2011-1519
10.0
CVE-2002-2417
10.0
CVE-2026-20182
KEV10.0
CVE-2026-20127
KEV10.0
CVE-2007-6234
10.0
CVE-2011-4051
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2020-5567 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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