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Vulnerability record · CVE-2020-21366 · published 20 June 2023

CVE-2020-21366: Njtech greencms cross-site request forgery vulnerability

Njtech · Greencms

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

8.0 CVSS 3.1 High EPSS 0.33% · top 76.9% CWE-352 · Cross-site request forgery
8.0CVSS 3.1 base score
0.33%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

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

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/GreenCMS/GreenCMS/issues/115 ExploitIssue Tracking
https://github.com/GreenCMS/GreenCMS/issues/115 ExploitIssue Tracking

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

8.8CVE-2018-11670Njtech greencms cross-site request forgery vulnerabilityAn issue was discovered in GreenCMS v2.3.0603. There is a CSRF vulnerability that allows attackers to execute arbitrary PHP code via the content para…EPSS 2.5%8.8CVE-2018-11671Njtech greencms cross-site request forgery vulnerabilityAn issue was discovered in GreenCMS v2.3.0603. There is a CSRF vulnerability that can add an admin account via index.php?m=admin&c=access&a=adduserha…EPSS 2.5%8.1CVE-2022-28918Njtech greencms vulnerabilityGreenCMS v2.3.0603 was discovered to contain an arbitrary file deletion vulnerability via /index.php?m=admin&c=custom&a=plugindelhandle&plugin_name=.EPSS 1.1%7.5CVE-2018-12604Njtech greencms sensitive information in log file vulnerabilityGreenCMS 2.3.0603 allows remote attackers to obtain sensitive information via a direct request for Data/Log/year_month_day.log.EPSS 13%7.1CVE-2019-25573Njtech greencms sql injection vulnerabilityGreen CMS 2.x contains an SQL injection vulnerability that allows authenticated attackers to execute arbitrary SQL queries by injecting malicious cod…EPSS 0.34%7.1CVE-2019-25574Njtech greencms path traversal vulnerabilityGreen CMS 2.x contains a path traversal vulnerability that allows authenticated attackers to download arbitrary files and directories by injecting di…EPSS 1.1%5.4CVE-2024-22570Njtech greencms cross-site scripting vulnerabilityA stored cross-site scripting (XSS) vulnerability in /install.php?m=install&c=index&a=step3 of GreenCMS v2.3 allows attackers to execute arbitrary we…EPSS 0.28%2.1CVE-2025-9415Njtech greencms improper access control vulnerabilityA vulnerability was identified in GreenCMS up to 2.3.0603. This affects an unknown part of the file /index.php?m=admin&c=media&a=fileconnect. The man…EPSS 0.35%

Source: NIST National Vulnerability Database (record CVE-2020-21366), CISA KEV, FIRST EPSS (scores of 2026-09-29). This page is refreshed as NVD updates the record.