Persistent Cross-Site Scripting Vulnerability in MyBB My Arcade Plugin
CVE-2018-25249

5.1MEDIUM

Key Information:

Vendor

Mybb

Status
Mybb My Arcade Plugin
Vendor
CVE Published:
4 April 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2018-25249?

The MyBB My Arcade Plugin version 1.3 is susceptible to a persistent cross-site scripting vulnerability that enables authenticated users to embed malicious scripts via game score comments. This flaw permits attackers to inject crafted HTML and JavaScript payloads that execute whenever other users interact with the comment, potentially leading to unauthorized actions or data exposure.

Affected Version(s)

MyBB My Arcade Plugin 1.3

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2018-25249 - Proof of Concept

References

https://www.exploit-db.com/exploits/44186
exploit
https://community.mybb.com/mods.php?action=view&pid=411
product
https://www.vulncheck.com/advisories/mybb-my-arcade-plugi...
third-party-advisory

CVSS V4

Score:
5.1
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

0xB9
.