CVE-2018-14840

MEDIUM

Subrion < 4.2.2 - Cross-Site Scripting via .html File Upload

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2018-14840. PoCs published by Zeel Chavda.

AI-analyzed exploit summary This is a writeup describing a stored XSS vulnerability in Subrion CMS 4.2.1 via CKEditor file upload. It outlines steps to exploit the vulnerability but does not include functional exploit code.

Description

uploads/.htaccess in Subrion CMS 4.2.1 allows XSS because it does not block .html file uploads (but does block, for example, .htm file uploads).

Exploits (1)

exploitdb WRITEUP
by Zeel Chavda · textwebappsphp
https://www.exploit-db.com/exploits/45150

This is a writeup describing a stored XSS vulnerability in Subrion CMS 4.2.1 via CKEditor file upload. It outlines steps to exploit the vulnerability but does not include functional exploit code.

Classification
Writeup 90%
Attack Type
Xss
Complexity
Trivial
Reliability
Reliable
Target: Subrion CMS 4.2.1
Auth required
Prerequisites: Access to CKEditor file upload functionality · Ability to craft and upload an HTML file with XSS payload
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (3)

Core 3
Core References
Exploit, Third Party Advisory, VDB Entry exploit x_refsource_exploit-db
https://www.exploit-db.com/exploits/45150/
Third Party Advisory x_refsource_misc
https://github.com/intelliants/subrion/issues/773

Scores

CVSS v3 6.1
EPSS 0.0307
EPSS Percentile 87.1%
Attack Vector NETWORK
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Details

CWE
CWE-79
Status published
Products (2)
intelliants/subrion 4.2.1
intelliants/subrion 0 - 4.2.2Packagist
Published Aug 02, 2018
Tracked Since Feb 18, 2026