CVE-2018-17128

MEDIUM

MyBB < 1.8.19 - Stored Cross-Site Scripting via Video MyCode in Visual Editor

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2018-17128. PoCs published by Numan OZDEMIR.

AI-analyzed exploit summary This is a writeup describing a stored XSS vulnerability in MyBB Visual Editor up to version 1.8.18, where the 'videotype' parameter in video embeds can be manipulated to execute arbitrary JavaScript in a victim's browser when they interact with a malicious post.

Description

A Persistent XSS issue was discovered in the Visual Editor in MyBB before 1.8.19 via a Video MyCode.

Exploits (1)

exploitdb WRITEUP
by Numan OZDEMIR · textwebappsphp
https://www.exploit-db.com/exploits/45449

This is a writeup describing a stored XSS vulnerability in MyBB Visual Editor up to version 1.8.18, where the 'videotype' parameter in video embeds can be manipulated to execute arbitrary JavaScript in a victim's browser when they interact with a malicious post.

Classification
Writeup 90%
Attack Type
Xss
Complexity
Trivial
Reliability
Reliable
Target: MyBB Visual Editor <= 1.8.18
Auth required
Prerequisites: Attacker must have the ability to create or edit a post in the MyBB forum · Victim must interact with the malicious post using the visual editor
MITRE ATT&CK
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (2)

Core 2
Core References
Exploit, Third Party Advisory, VDB Entry exploit x_refsource_exploit-db
https://www.exploit-db.com/exploits/45449/

Scores

CVSS v3 5.4
EPSS 0.7475
EPSS Percentile 99.4%
Attack Vector NETWORK
CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Details

CWE
CWE-79
Status published
Products (1)
mybb/mybb < 1.8.19
Published Sep 17, 2018
Tracked Since Feb 18, 2026