CVE-2020-5585Network attack vector

Script execution via administrator-controlled image assets

Published Jun 30, 2020 · Updated Aug 4, 2024

Cross-site scripting in Cybozu Garoon 5.0.0 through 5.0.1 allows remote authenticated users to execute script through image assets. The image asset functionality accepts administrator-controlled content that is rendered as script in an administrator's browser; Cybozu has not disclosed the exact input field or faulty output operation. Administrative rights are required to plant the payload, and an administrator must view the affected content, limiting the result to script execution in that user's browser.

CVSS severity4.8
Medium
EPSS probability0.53%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in Cybozu Garoon 5.0.0 through 5.0.1 allows remote authenticated users to execute script through image assets. The image asset functionality accepts administrator-controlled content that is rendered as script in an administrator's browser; Cybozu has not disclosed the exact input field or faulty output operation. Administrative rights are required to plant the payload, and an administrator must view the affected content, limiting the result to script execution in that user's browser.

The record

CVE
CVE-2020-5585
Published
Jun 30, 2020
Updated
Aug 4, 2024
Vendor
Cybozu
Product
Garoon
Classifications
CWE-79, T1189
Attack vector
network
Privileges
admin

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=5.0.0 to 5.0.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Cybozu · Garoonversion=5.0.0 to 5.0.1

Published CVSS scores

5.5JPCERT/CC JVNAV:N/AC:L/Au:S/C:P/I:P/A:N
4.8JPCERT/CC JVNCVSS:3.0/AV:N/AC:L/PR:H/UI:R/S:C/C:L/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-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1189Drive-by Compromise

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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