medium5.5
CVE-2021-39338
The MyBB Cross-Poster WordPress plugin is vulnerable to Stored Cross-Site Scripting due to insufficient input validation and sanitization via several parameter…
Impact
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.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Mybb Cross-Poster Project | Mybb Cross-Poster | through 1.0 |
Weakness classification
References
- NVD record
- CVE.org record
- 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://www.wordfence.com/vulnerability-advisories/#CVE-2021-39338
- 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://www.wordfence.com/vulnerability-advisories/#CVE-2021-39338