CVE-2023-43876

MEDIUM

October CMS 3.4.16 - Cross-Site Scripting via Installation dbhost Field

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2023-43876. PoCs published by sromanhu.

AI-analyzed exploit summary This repository demonstrates a reflected XSS vulnerability in October CMS v3.4.16 during the installation process. The exploit injects a malicious payload into the 'dbhost' field, triggering arbitrary JavaScript execution when the installation proceeds.

Description

A Cross-Site Scripting (XSS) vulnerability in installation of October v.3.4.16 allows an attacker to execute arbitrary web scripts via a crafted payload injected into the dbhost field.

Exploits (1)

nomisec WORKING POC
by sromanhu · poc
https://github.com/sromanhu/CVE-2023-43876-October-CMS-Reflected-XSS---Installation

This repository demonstrates a reflected XSS vulnerability in October CMS v3.4.16 during the installation process. The exploit injects a malicious payload into the 'dbhost' field, triggering arbitrary JavaScript execution when the installation proceeds.

Classification
Working Poc 90%
Attack Type
Xss
Complexity
Trivial
Reliability
Reliable
Target: October CMS v3.4.16
No auth needed
Prerequisites: Access to the October CMS installation page
MITRE ATT&CK
devstral-2 · analyzed Feb 19, 2026 Full analysis →

References (1)

Core 1

Scores

CVSS v3 5.4
EPSS 0.0026
EPSS Percentile 49.9%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/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 (2)
october/cms 0Packagist
octobercms/october 3.4.16
Published Sep 28, 2023
Tracked Since Feb 18, 2026