cvedb.io
CVE-2021-39338
MEDIUM · CVSS 5.5
EPSS exploitation probability: 0%
Published 2021-10-15T13:15:07.893 · Last modified 2026-06-17T04:03:34.500

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.

Affected products

mybb_cross-poster_project — mybb_cross-poster

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References

This product uses data from the NVD API but is not endorsed or certified by the NVD. Informational only; not professional security advice.