CVE-2020-23837

HIGH

GetSimple CMS Multi User 1.8.2 - CSRF

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2020-23837. PoCs published by boku.

AI-analyzed exploit summary This exploit demonstrates a CSRF vulnerability in GetSimple CMS's Multi User plugin v1.8.2, allowing an attacker to add an admin user by tricking an authenticated admin into visiting a malicious page. The PoC includes a crafted HTML form that submits a POST request to the vulnerable endpoint.

Description

A Cross-Site Request Forgery (CSRF) vulnerability in the Multi User plugin 1.8.2 for GetSimple CMS allows remote attackers to add admin (or other) users after an authenticated admin visits a third-party site or clicks on a URL.

Exploits (1)

exploitdb WORKING POC
by boku · textwebappsphp
https://www.exploit-db.com/exploits/48745

This exploit demonstrates a CSRF vulnerability in GetSimple CMS's Multi User plugin v1.8.2, allowing an attacker to add an admin user by tricking an authenticated admin into visiting a malicious page. The PoC includes a crafted HTML form that submits a POST request to the vulnerable endpoint.

Classification
Working Poc 100%
Attack Type
Auth Bypass
Complexity
Trivial
Reliability
Reliable
Target: GetSimple CMS Plugin Multi User v1.8.2
Auth required
Prerequisites: Authenticated admin session · Victim visits attacker-controlled page
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (2)

Core 2
Core References
Third Party Advisory x_refsource_misc
http://get-simple.info/extend/plugin/multi-user/133/
Exploit, Third Party Advisory, VDB Entry x_refsource_misc
https://www.exploit-db.com/exploits/48745

Scores

CVSS v3 8.8
EPSS 0.0081
EPSS Percentile 52.0%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Details

CWE
CWE-352
Status published
Products (1)
multi_user_project/multi_user 1.8.2
Published Sep 25, 2020
Tracked Since Feb 18, 2026