CVE-2026-5357

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.

PUBLISHED Reserved 2026-04-01 | Published 2026-04-09 | Updated 2026-04-09 | Assigner Wordfence

Problem types

CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Product status

Timeline

Credits

Djaidja Moundjid finder

References

www.wordfence.com/...-c03a-4de7-bc38-791401d1685b?source=cve

plugins.trac.wordpress.org/...unk/src/User/views/members.php

plugins.trac.wordpress.org/....51/src/User/views/members.php

plugins.trac.wordpress.org/...anager/trunk/src/User/User.php

plugins.trac.wordpress.org/.../tags/3.3.51/src/User/User.php

plugins.trac.wordpress.org/...-manager&sfp_email=&sfph_mail=

cve.org (CVE-2026-5357)

nvd.nist.gov (CVE-2026-5357)

Download JSON