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The Photo Engine (Media Organizer & Lightroom) plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'hierarchy[].name' parameter in all versions up to, and including, 6.5.7 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with subscriber-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This is exploitable by Subscribers because the /?wplr-sync-api endpoint authenticates solely via wplr_auth_token usermeta with no capability check, and the current user's token is exposed on every admin page via localized script data due to a commented-out screen-condition guard.

• https://www.wordfence.com/threat-intel/vulnerabilities/id/ebb6a31a-3d12-4dd1-b9f8-5d9e17f0bf48?source=cve
• https://plugins.trac.wordpress.org/browser/wplr-sync/tags/6.5.6/classes/explorer.php#L63
• https://plugins.trac.wordpress.org/browser/wplr-sync/tags/6.5.6/classes/core.php#L1983
• https://plugins.trac.wordpress.org/browser/wplr-sync/tags/6.5.6/classes/core.php#L2057
• https://plugins.trac.wordpress.org/browser/wplr-sync/tags/6.5.6/classes/api.php#L290
• https://plugins.trac.wordpress.org/browser/wplr-sync/tags/6.5.6/classes/api.php#L116
• https://plugins.trac.wordpress.org/browser/wplr-sync/tags/6.5.6/classes/admin.php#L80
• https://plugins.trac.wordpress.org/changeset?old_path=/wplr-sync/tags/6.5.6&new_path=/wplr-sync/tags/6.5.8