What’s Vulnerable › Vulnerabilities

CVE-2020-23839

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 10.5% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2020-09-01 · updated 2026-06-17
• Weakness: CWE-79

Description

A Reflected Cross-Site Scripting (XSS) vulnerability in GetSimple CMS v3.3.16, in the admin/index.php login portal webpage, allows remote attackers to execute JavaScript code in the client's browser and harvest login credentials after a client clicks a link, enters credentials, and submits the login form.

Affected products

• GetSimple CMS: 3.3.16

References

• http://packetstormsecurity.com/files/162016/GetSimple-CMS-3.3.16-Cross-Site-Scripting-Shell-Upload.html
• https://github.com/GetSimpleCMS/GetSimpleCMS/issues/1330
• https://github.com/boku7/CVE-2020-23839
• https://www.exploit-db.com/exploits/49726
• http://packetstormsecurity.com/files/162016/GetSimple-CMS-3.3.16-Cross-Site-Scripting-Shell-Upload.html
• https://github.com/GetSimpleCMS/GetSimpleCMS/issues/1330
• https://github.com/boku7/CVE-2020-23839
• https://www.exploit-db.com/exploits/49726

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