CVE-2026-5357

Vulnerability Description

The Download Manager plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'sid' parameter of the 'wpdm_members' shortcode in versions up to and including 3.3.52. This is due to insufficient input sanitization and output escaping on the user-supplied 'sid' shortcode attribute. The sid parameter is extracted without sanitization in the members() function and stored via update_post_meta(), then echoed directly into an HTML id attribute in the members.php template without applying esc_attr(). This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses the injected page.

CVSS Score

Related Weaknesses (CWE)

References

• https://plugins.trac.wordpress.org/browser/download-manager/tags/3.3.51/src/User
• https://plugins.trac.wordpress.org/browser/download-manager/tags/3.3.51/src/User
• https://plugins.trac.wordpress.org/browser/download-manager/trunk/src/User/User.
• https://plugins.trac.wordpress.org/browser/download-manager/trunk/src/User/views
• https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old
• https://www.wordfence.com/threat-intel/vulnerabilities/id/27fc81b0-c03a-4de7-bc3