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CVE-2018-25248— MyBB Downloads Plugin 2.0.3 Persistent XSS via downloads.php

Quick assessment

Affected
MyBB MyBB Downloads Plugin
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

MyBB（MyBulletinBoard）是MyBB团队的一套用PHP和MySQL开发的免费且基于Web的论坛软件。该软件具有简单易用、支持多国语言、可扩展等特点。 MyBB（MyBulletinBoard） 2.0.3版本存在跨站脚本漏洞，该漏洞源于下载标题字段未正确清理输入，可能导致普通成员通过下载标题参数注入恶意脚本。

CVSS 7.2 · High EPSS 0.22% · P12

Affected Version Matrix 1

VendorProduct Version RangeStatus
MyBB MyBB Downloads Plugin 2.0.3 affected
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I. Basic Information for CVE-2018-25248

Vulnerability Information
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Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
MyBB Downloads Plugin 2.0.3 Persistent XSS via downloads.php
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
MyBB（MyBulletinBoard） 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
MyBB（MyBulletinBoard）是MyBB团队的一套用PHP和MySQL开发的免费且基于Web的论坛软件。该软件具有简单易用、支持多国语言、可扩展等特点。 MyBB（MyBulletinBoard） 2.0.3版本存在跨站脚本漏洞，该漏洞源于下载标题字段未正确清理输入，可能导致普通成员通过下载标题参数注入恶意脚本。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
MyBB MyBB Downloads Plugin 2.0.3 -

II. Public POCs for CVE-2018-25248

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III. Intelligence Information for CVE-2018-25248

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Exploits & Public PoCs for CVE-2018-25248 (1)

News Coverage for CVE-2018-25248 (1)

Same Patch Batch · MyBB · 2026-04-04 · 4 CVEs total

CVE-2018-25250 7.2 HIGH MyBB Last User's Threads in Profile Plugin 1.2 Persistent XSS
CVE-2018-25249 6.4 MEDIUM MyBB My Arcade Plugin 1.3 Persistent XSS via Comment
CVE-2018-25247 6.1 MEDIUM MyBB Like Plugin 3.0.0 Cross-Site Scripting via User Profiles

IV. Related Vulnerabilities

Same vendor: MyBB
Same weakness: CWE-79

V. Comments for CVE-2018-25248

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