{"id":"CVE-2026-104003","state":"PUBLISHED","title":"Paid Membership Plugin, Ecommerce, User Registration Form, Login Form, User Profile & Restrict Content <= 4.17.5 - Authenticated (Subscriber+) Arbitrary Shortcode Execution via Comment Content Rendered on ProfilePress User Profile 'Comments' Tab","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.","publishedAt":"2026-10-16T08:27:43.226Z","updatedAt":"2026-10-16T14:59:31.371Z","severity":{"score":5.4,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N","source":"Wordfence"},"assigner":"Wordfence","products":["properfraction Paid Membership Plugin, Ecommerce, User Registration Form, Login Form, User Profile & Restrict Content – ProfilePress"],"affected":[{"vendor":"properfraction","product":"Paid Membership Plugin, Ecommerce, User Registration Form, Login Form, User Profile & Restrict Content – ProfilePress","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThanOrEqual":"4.17.5","versionType":"semver"}]}],"references":["https://www.wordfence.com/threat-intel/vulnerabilities/id/83adfbff-f625-4474-81b9-961c496d59a0?source=cve","https://plugins.trac.wordpress.org/browser/wp-user-avatar/tags/4.17.5/src/ShortcodeParser/FrontendProfileTag.php#L142","https://plugins.trac.wordpress.org/browser/wp-user-avatar/tags/4.17.5/src/ShortcodeParser/Builder/FrontendProfileBuilder.php#L169","https://plugins.trac.wordpress.org/browser/wp-user-avatar/tags/4.17.5/src/Themes/DragDrop/UserProfile/DefaultTemplate.php#L379","https://plugins.trac.wordpress.org/browser/wp-user-avatar/tags/4.17.5/src/Functions/GlobalFunctions.php#L1768","https://pastebin.com/raw/pCgrW6Pf","https://plugins.trac.wordpress.org/browser/wp-user-avatar/tags/4.17.6/src/ShortcodeParser/FrontendProfileTag.php"],"weaknesses":["CWE-94"],"ingestedAt":"2026-10-29T20:10:23.711Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/104xxx/CVE-2026-104003.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-104003","state":"PUBLISHED","datePublished":"2026-10-16T08:27:43.226Z","dateUpdated":"2026-10-16T14:59:31.371Z","assignerShortName":"Wordfence","assignerOrgId":"b15e7b5b-3da4-40ae-a43c-f7aa60e62599","dateReserved":"2026-10-01T16:20:45.881Z"},"containers":{"cna":{"title":"Paid Membership Plugin, Ecommerce, User Registration Form, Login Form, User Profile & Restrict Content <= 4.17.5 - Authenticated (Subscriber+) Arbitrary Shortcode Execution via Comment Content Rendered on ProfilePress User Profile 'Comments' Tab","descriptions":[{"lang":"en","value":"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":[{"vendor":"properfraction","product":"Paid Membership Plugin, Ecommerce, User Registration Form, Login Form, User Profile & Restrict Content – ProfilePress","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThanOrEqual":"4.17.5","versionType":"semver"}]}],"references":[{"url":"https://www.wordfence.com/threat-intel/vulnerabilities/id/83adfbff-f625-4474-81b9-961c496d59a0?source=cve"},{"url":"https://plugins.trac.wordpress.org/browser/wp-user-avatar/tags/4.17.5/src/ShortcodeParser/FrontendProfileTag.php#L142"},{"url":"https://plugins.trac.wordpress.org/browser/wp-user-avatar/tags/4.17.5/src/ShortcodeParser/Builder/FrontendProfileBuilder.php#L169"},{"url":"https://plugins.trac.wordpress.org/browser/wp-user-avatar/tags/4.17.5/src/Themes/DragDrop/UserProfile/DefaultTemplate.php#L379"},{"url":"https://plugins.trac.wordpress.org/browser/wp-user-avatar/tags/4.17.5/src/Functions/GlobalFunctions.php#L1768"},{"url":"https://pastebin.com/raw/pCgrW6Pf"},{"url":"https://plugins.trac.wordpress.org/browser/wp-user-avatar/tags/4.17.6/src/ShortcodeParser/FrontendProfileTag.php"}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N","baseScore":5.4,"baseSeverity":"MEDIUM"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-94","lang":"en","description":"CWE-94 Improper Control of Generation of Code ('Code Injection')","type":"CWE"}]}],"providerMetadata":{"shortName":"Wordfence","orgId":"b15e7b5b-3da4-40ae-a43c-f7aa60e62599","dateUpdated":"2026-10-16T08:27:43.226Z"},"credits":[{"lang":"en","type":"finder","value":"Kuba"}],"timeline":[{"time":"2026-10-01T16:35:57.000Z","lang":"en","value":"Vendor Notified"},{"time":"2026-10-15T19:57:58.000Z","lang":"en","value":"Disclosed"}]},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2026-104003","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2026-10-16T14:53:07.727463Z"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-16T14:59:31.371Z"}}]}}}