CVE-2023-43339

MEDIUM

CMS Made Simple 2.2.18 - Stored Cross-Site Scripting via Database Configuration Parameters

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2023-43339. PoCs published by sromanhu.

AI-analyzed exploit summary This repository documents a reflected XSS vulnerability in CMS Made Simple v2.2.18 during the installation process, where malicious JavaScript can be injected via the Database Name, User, or Port fields. The writeup includes a proof-of-concept payload and screenshots demonstrating the exploit.

Description

Cross-Site Scripting (XSS) vulnerability in cmsmadesimple v.2.2.18 allows a local attacker to execute arbitrary code via a crafted payload injected into the Database Name, DataBase User or Database Port components.

Exploits (1)

nomisec WRITEUP
by sromanhu · poc
https://github.com/sromanhu/CVE-2023-43339-CMSmadesimple-Reflected-XSS---Installation

This repository documents a reflected XSS vulnerability in CMS Made Simple v2.2.18 during the installation process, where malicious JavaScript can be injected via the Database Name, User, or Port fields. The writeup includes a proof-of-concept payload and screenshots demonstrating the exploit.

Classification
Writeup 90%
Attack Type
Xss
Complexity
Trivial
Reliability
Reliable
Target: CMS Made Simple v2.2.18
No auth needed
Prerequisites: Access to the CMS Made Simple installation page
MITRE ATT&CK
devstral-2 · analyzed Feb 18, 2026 Full analysis →

References (3)

Core 3

Scores

CVSS v3 6.1
EPSS 0.0065
EPSS Percentile 46.0%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact partial

Details

CWE
CWE-79
Status published
Products (1)
cmsmadesimple/cms_made_simple 2.2.18
Published Sep 25, 2023
Tracked Since Feb 18, 2026