Vulnerabilities > CVE-2021-39338 - Unspecified vulnerability in Mybb Cross-Poster Project Mybb Cross-Poster 1.0
Attack vector
NETWORK Attack complexity
LOW Privileges required
HIGH Confidentiality impact
LOW Integrity impact
LOW Availability impact
NONE Summary
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.
Vulnerable Configurations
| Part | Description | Count |
|---|---|---|
| Application | 2 |
References
- https://github.com/BigTiger2020/word-press/blob/main/MyBB%20Cross-Poster.md
- https://github.com/BigTiger2020/word-press/blob/main/MyBB%20Cross-Poster.md
- https://plugins.trac.wordpress.org/browser/mybb-cross-poster/trunk/classes/MyBBXPSettings.php
- https://plugins.trac.wordpress.org/browser/mybb-cross-poster/trunk/classes/MyBBXPSettings.php
- https://www.wordfence.com/vulnerability-advisories/#CVE-2021-39338
- https://www.wordfence.com/vulnerability-advisories/#CVE-2021-39338