Vulnerability record · CVE-2020-23839 · published 1 September 2020

CVE-2020-23839: Get-simple getsimple cms cross-site scripting vulnerability

Get Simple · Getsimple Cms

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.

6.1 CVSS 3.1 Medium EPSS 10% · top 4.4% CWE-79 · Cross-site scripting

6.1CVSS 3.1 base score, v2 4.3

10%EPSS exploitation probability, 30 days

NoNot in CISA KEV

1Affected product versions listed by NVD

8References, 2 tagged exploit

17 Jun 2026Last modified by NVD

Description

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

Affected products

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

Getsimple Cms Get Simple

References

Link	Tags
http://packetstormsecurity.com/files/162016/GetSimple-CMS-3.3.16-Cross-Site-Scripting-Shell-Upload.html	Third Party AdvisoryVDB Entry
https://github.com/GetSimpleCMS/GetSimpleCMS/issues/1330	ExploitThird Party Advisory
https://github.com/boku7/CVE-2020-23839	Third Party Advisory
https://www.exploit-db.com/exploits/49726	Third Party AdvisoryVDB Entry
http://packetstormsecurity.com/files/162016/GetSimple-CMS-3.3.16-Cross-Site-Scripting-Shell-Upload.html	Third Party AdvisoryVDB Entry
https://github.com/GetSimpleCMS/GetSimpleCMS/issues/1330	ExploitThird Party Advisory
https://github.com/boku7/CVE-2020-23839	Third Party Advisory
https://www.exploit-db.com/exploits/49726	Third Party AdvisoryVDB Entry

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Related vulnerabilities

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

9.8CVE-2022-41544Get-simple getsimple cms code injection vulnerabilityGetSimple CMS v3.3.16 was discovered to contain a remote code execution (RCE) vulnerability via the edited_file parameter in admin/theme-edit.php.EPSS 11%18 Oct 2022 9.8CVE-2019-11231GetSimple CMS theme-edit.php arbitrary file upload and auth bypassGetSimple CMS through 3.3.15 has insufficient input sanitation in admin/theme-edit.php, allowing an authenticated user to upload files with arbitrary…EPSS 72%analysed22 May 2019 8.8CVE-2018-17103Get-simple getsimple cms cross-site request forgery vulnerabilityAn issue was discovered in GetSimple CMS v3.3.13. There is a CSRF vulnerability that can change the administrator's password via admin/settings.php. …EPSS 0.65%16 Sep 2018 7.5CVE-2014-8722Get-simple getsimple cms information exposure vulnerabilityGetSimple CMS 3.3.4 allows remote attackers to obtain sensitive information via a direct request to (1) data/users/<username>.xml, (2) backups/users/…EPSS 14%17 Mar 2017 6.1CVE-2013-1420Get-simple getsimple cms cross-site scripting vulnerabilityMultiple cross-site scripting (XSS) vulnerabilities in GetSimple CMS before 3.2.1 allow remote attackers to inject arbitrary web script or HTML via t…EPSS 1.1%2 Jan 2020 6.1CVE-2018-16325Get-simple getsimple cms cross-site scripting vulnerabilityThere is XSS in GetSimple CMS 3.4.0.9 via the admin/edit.php title field.EPSS 0.80%1 Sep 2018 6.1CVE-2018-9173Get-simple getsimple cms cross-site scripting vulnerabilityCross-site scripting (XSS) vulnerability in admin/template/js/uploadify/uploadify.swf in GetSimple CMS 3.3.13 allows remote attackers to inject arbit…EPSS 2.4%2 Apr 2018 6.1CVE-2017-10673Get-simple getsimple cms cross-site scripting vulnerabilityadmin/profile.php in GetSimple CMS 3.x has XSS in a name field.EPSS 0.65%29 Jun 2017

Source: NIST National Vulnerability Database (record CVE-2020-23839), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.