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{"cveTags": [], "descriptions": [{"lang": "en", "value": "The BitForm plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's 'bitform' shortcode in versions up to, and including, 1.1.0. This is due to insufficient input sanitization and output escaping on user-supplied shortcode attributes ('width' and 'height') in the Shortcode::shortcode() function, which are interpolated directly into the 'style' attribute of an <iframe> element. 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."}], "id": "CVE-2026-8891", "lastModified": "2026-05-27T14:50:47.627", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.4, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 3.1, "impactScore": 2.7, "source": "[email protected]", "type": "Primary"}]}, "published": "2026-05-27T07:16:17.603", "references": [{"source": "[email protected]", "url": "https://plugins.trac.wordpress.org/browser/bitform/tags/1.1.0/Common/Shortcode.php#L13"}, {"source": "[email protected]", "url": "https://plugins.trac.wordpress.org/browser/bitform/tags/1.1.0/Common/Shortcode.php#L17"}, {"source": "[email protected]", "url": "https://plugins.trac.wordpress.org/browser/bitform/tags/1.1.0/index.php#L54"}, {"source": "[email protected]", "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/71167dec-38ec-4eb3-8fab-25eca0f8b071?source=cve"}], "sourceIdentifier": "[email protected]", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-79"}], "source": "[email protected]", "type": "Primary"}]}

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