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CVE-2026-104003

MEDIUM 5.4 CVSS 3.1
Published
October 16, 2026
Last modified
October 16, 2026
NVD status
Deferred
Reported by
security@wordfence.com
Weakness
CWE-94
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

Description

The WP User Avatar / ProfilePress plugin for WordPress is vulnerable to Arbitrary Shortcode Execution in versions up to, and including, 4.17.5. This is due to the get_user_profile_structure() function assembling the front-end profile buffer — which includes raw comment excerpts inlined by author_comment_query() — and passing the entire buffer to do_shortcode() after only a narrow neutralization pass (ppress_neutralize_buffer_shortcodes) that blocks pp-custom-html and bracket fragments containing HTML delimiters but leaves any other well-formed shortcode intact. This makes it possible for authenticated attackers, with Subscriber-level access and above, to inject arbitrary shortcodes (from any active plugin or theme) with attacker-chosen attributes by posting a comment whose body contains the shortcode markup; the shortcode is then executed server-side when any visitor loads the target's front-end profile Comments tab, letting the attacker reach capability-gated or data-returning shortcodes and inject raw HTML markup into a publicly viewable page.

Affected WordPress components

  • Paid Membership Plugin, Ecommerce, User Registration Form, Login Form, User Profile & Restrict Content – ProfilePress Plugin · wp-user-avatar
    Confirmed match Active
    Up to and including 4.17.5
    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

  • properfraction Paid Membership Plugin, Ecommerce, User Registration Form, Login Form, User Profile & Restrict Content – ProfilePress — Up to and including 4.17.5

References

  • pastebin.com https://pastebin.com/raw/pCgrW6Pf
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/wp-user-avatar/tags/4.17.5/src/Functions/GlobalFunctions.php#L1768
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/wp-user-avatar/tags/4.17.5/src/ShortcodeParser/Builder/FrontendProfileBuilder.php#L169
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/wp-user-avatar/tags/4.17.5/src/ShortcodeParser/FrontendProfileTag.php#L142
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/wp-user-avatar/tags/4.17.5/src/Themes/DragDrop/UserProfile/DefaultTemplate.php#L379
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/wp-user-avatar/tags/4.17.6/src/ShortcodeParser/FrontendProfileTag.php
  • www.wordfence.com https://www.wordfence.com/threat-intel/vulnerabilities/id/83adfbff-f625-4474-81b9-961c496d59a0?source=cve
  • nvd.nist.gov Official NVD record