Security Advisory

CVE-2021-39338

CVE vulnerability detail — eXtreme Datacenter Security Operations

Published 2021-10-15 12:15:41

Last updated 2025-03-31 17:59:47

Assigner Wordfence

State PUBLISHED

Description

The MyBB Cross-Poster WordPress plugin is vulnerable to Stored Cross-Site Scripting due to insufficient input validation and sanitization via several parameters found in the ~/classes/MyBBXPSettings.php file which allowed attackers with administrative user access to inject arbitrary web scripts, in versions up to and including 1.0. This affects multi-site installations where unfiltered_html is disabled for administrators, and sites where unfiltered_html is disabled.

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