CVE-2020-21366

HIGHNVD 8.08.0—

8.0

Cross Site Request Forgery vulnerability in GreenCMS v.2.3 allows an attacker to gain privileges via the adduser function of index.php.

CVSS v3: 8.0
EG Score: 8.0(medium)
EPSS: 23.6%
KEV: Not listed

Published

June 20, 2023

Last Modified

December 10, 2024

References (2)

cve@mitrehttps://github.com/GreenCMS/GreenCMS/issues/115
af854a3a-2127-422b-91ae-364da2661108https://github.com/GreenCMS/GreenCMS/issues/115

Weakness Classification(1)

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

CWE-352Cross-Site Request Forgery (CSRF)

Data Freshness Timeline

(refreshed 16× 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.

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Frequently asked(5)

What is CVE-2020-21366?

CVE-2020-21366 is a high vulnerability published on June 20, 2023. Cross Site Request Forgery vulnerability in GreenCMS v.2.3 allows an attacker to gain privileges via the adduser function of index.php.

When was CVE-2020-21366 disclosed?

CVE-2020-21366 was first published in the National Vulnerability Database on June 20, 2023, with the most recent update on December 10, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2020-21366 actively exploited?

CVE-2020-21366 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 23.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2020-21366?

CVE-2020-21366 has a CVSS v3 base score of 8.0 (NVD).

How do I remediate CVE-2020-21366?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2020-21366, 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.

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CVE-2020-21366

📅 Published

🔄 Last Modified

🔗 References (2)

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2020-21366?

🔗 Related CVEs(same CWE)

Same CWE

Published

Last Modified

References (2)

Frequently asked(5)

Related CVEs(same CWE)