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CVE-2026-13042

HIGH 7.2 CVSS 3.1
Published
July 16, 2026
Last modified
July 18, 2026
NVD status
Deferred
Reported by
security@wordfence.com
Weakness
CWE-79
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

Description

The RPB Chessboard plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Comment Content in all versions up to, and including, 8.1.2 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. WordPress's save-time kses sanitization does not mitigate this issue because the crafted payload uses only kses-allowed tags and attributes (such as an <a> element with title and href), and the dangerous attribute-breaking HTML is synthesized entirely at render time by the plugin's own comment_text filter.

Affected WordPress components

A confirmed match is backed by the plugin or theme slug. A possible match is based on the product name only and should be verified.

Affected products and versions

  • yo35 RPB Chessboard — Up to and including 8.1.2

References

  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/rpb-chessboard/tags/8.1.0/php/abstractcontroller.php#L171
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/rpb-chessboard/tags/8.1.0/php/abstractcontroller.php#L190
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/rpb-chessboard/tags/8.1.0/php/abstractcontroller.php#L220
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/rpb-chessboard/tags/8.1.2/php/abstractcontroller.php#L171
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/rpb-chessboard/tags/8.1.2/php/abstractcontroller.php#L190
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/rpb-chessboard/tags/8.1.2/php/abstractcontroller.php#L220
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/changeset?reponame=&old=3604068%40rpb-chessboard&new=3604068%40rpb-chessboard
  • www.wordfence.com https://www.wordfence.com/threat-intel/vulnerabilities/id/848b9c6d-e0db-43ad-ac6d-3674435339dd?source=cve
  • nvd.nist.gov Official NVD record