CVE-2018-25248

HIGH

MyBB Downloads Plugin 2.0.3 Persistent XSS via downloads.php

Title source: cna
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2018-25248. PoCs published by 0xB9.

AI-analyzed exploit summary The exploit describes a persistent XSS vulnerability in MyBB Downloads Plugin v2.0.3, where an attacker can inject malicious JavaScript into the title field of a new download, which executes when an admin reviews it. The proof of concept is straightforward and relies on user input being rendered without proper sanitization.

Description

MyBB Downloads Plugin 2.0.3 contains a persistent cross-site scripting vulnerability that allows regular members to inject malicious scripts through the download title field. Attackers can submit a new download with HTML/JavaScript code in the title parameter, which executes when administrators validate the download in downloads.php.

Exploits (1)

exploitdb WRITEUP
by 0xB9 · textwebappsphp
https://www.exploit-db.com/exploits/44400

The exploit describes a persistent XSS vulnerability in MyBB Downloads Plugin v2.0.3, where an attacker can inject malicious JavaScript into the title field of a new download, which executes when an admin reviews it. The proof of concept is straightforward and relies on user input being rendered without proper sanitization.

Classification
Writeup 90%
Attack Type
Xss
Complexity
Trivial
Reliability
Reliable
Target: MyBB Downloads Plugin v2.0.3
Auth required
Prerequisites: User account with permission to create downloads · Admin interaction to review the download
devstral-2 · analyzed Apr 07, 2026 Full analysis →

References (3)

Core 3
Core References
Third Party Advisory third-party-advisory
VulnCheck Advisory: MyBB Downloads Plugin 2.0.3 Persistent XSS via downloads.php
https://www.vulncheck.com/advisories/mybb-downloads-plugin-persistent-xss-via-downloads-php
Exploit exploit
ExploitDB-44400
https://www.exploit-db.com/exploits/44400

Scores

CVSS v3 7.2
EPSS 0.0022
EPSS Percentile 13.0%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/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)
MyBB/MyBB Downloads Plugin 2.0.3
mybb/mybb_downloads 2.0.3
Published Apr 04, 2026
Tracked Since Apr 04, 2026