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CVE-2026-6275

MEDIUM 6.4 CVSS 3.1
Published
May 29, 2026
Last modified
July 21, 2026
NVD status
Deferred
Reported by
security@wordfence.com
Weakness
CWE-79
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

Description

The StatCounter – Free Real Time Visitor Stats plugin for WordPress is vulnerable to Stored Cross-Site Scripting in versions up to, and including, 2.1.1 This is due to insufficient output escaping on the post author's nickname in the statcounter_addToTags() function. The function is hooked to wp_head and fires on every single post page. It retrieves the post author's nickname via the_author_meta() and echoes it directly into a JavaScript double-quoted string context inside a <script> block without applying esc_js() or any equivalent JavaScript-context escaping. This makes it possible for authenticated attackers with Author-level access and above to inject arbitrary web scripts into pages that will execute whenever any user (including unauthenticated visitors) accesses a post authored by the attacker.

Affected WordPress components

  • StatCounter – Real Time Visitor Stats, Session Replay & Heatmaps Plugin · official-statcounter-plugin-for-wordpress
    Confirmed match Active
    Up to and including 2.1.1
    View on WordPress.org

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

  • statcounter StatCounter – Free Real Time Visitor Stats — Up to and including 2.1.1

References

  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/official-statcounter-plugin-for-wordpress/tags/2.1.1/StatCounter-Wordpress-Plugin.php#L266
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/official-statcounter-plugin-for-wordpress/tags/2.1.1/StatCounter-Wordpress-Plugin.php#L274
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/official-statcounter-plugin-for-wordpress/trunk/StatCounter-Wordpress-Plugin.php#L266
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/official-statcounter-plugin-for-wordpress/trunk/StatCounter-Wordpress-Plugin.php#L274
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/changeset?old_path=%2Fofficial-statcounter-plugin-for-wordpress/tags/2.1.1&new_path=%2Fofficial-statcounter-plugin-for-wordpress/tags/2.1.2
  • www.wordfence.com https://www.wordfence.com/threat-intel/vulnerabilities/id/30e0bf40-7f7b-43e6-8439-6dc00a889344?source=cve
  • nvd.nist.gov Official NVD record