CVE-2023-27304

MEDIUMNVD 4.34.3—

4.3

Operation restriction bypass vulnerability in Message and Bulletin of Cybozu Garoon 4.6.0 to 5.9.2 allows a remote authenticated attacker to alter the data of Message and/or Bulletin.

CVSS v3: 4.3
EG Score: 4.3(medium)
EPSS: 38.1%
KEV: Not listed

Published

May 23, 2023

Last Modified

January 17, 2025

References (4)

vultures@jpcerthttps://cs.cybozu.co.jp/2023/007698.html
vultures@jpcerthttps://jvn.jp/en/jp/JVN41694426/
af854a3a-2127-422b-91ae-364da2661108https://cs.cybozu.co.jp/2023/007698.html
af854a3a-2127-422b-91ae-364da2661108https://jvn.jp/en/jp/JVN41694426/

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-862Missing Authorization

Data Freshness Timeline

(refreshed 15× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-05 22:46 UTCepss_batch
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2026-05-31 22:29 UTCepss_batch
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2026-05-27 13:39 UTCepss_batch
2026-05-27 13:39 UTCepss_batch

Frequently asked(5)

What is CVE-2023-27304?

CVE-2023-27304 is a medium vulnerability published on May 23, 2023. Operation restriction bypass vulnerability in Message and Bulletin of Cybozu Garoon 4.6.0 to 5.9.2 allows a remote authenticated attacker to alter the data of Message and/or Bulletin.

When was CVE-2023-27304 disclosed?

CVE-2023-27304 was first published in the National Vulnerability Database on May 23, 2023, with the most recent update on January 17, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2023-27304 actively exploited?

CVE-2023-27304 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 38.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2023-27304?

CVE-2023-27304 has a CVSS v3 base score of 4.3 (NVD).

How do I remediate CVE-2023-27304?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-27304, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2023-27304

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Is Your Infrastructure Affected by CVE-2023-27304?

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Frequently asked(5)

What is CVE-2023-27304?

When was CVE-2023-27304 disclosed?

Is CVE-2023-27304 actively exploited?

What is the CVSS score of CVE-2023-27304?

CVE-2023-27304 has a CVSS v3 base score of 4.3 (NVD).

How do I remediate CVE-2023-27304?

CVE-2023-27304

📅 Published

🔄 Last Modified

🔗 References (4)

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2023-27304?

CVE-2023-27304

📅 Published

🔄 Last Modified

🔗 References (4)

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2023-27304?

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References (4)

Frequently asked(5)

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References (4)

Frequently asked(5)

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