CVE-2026-5357

<!-- Stored XSS PoC via wpdm_members shortcode --> <!-- Attacker payload in post content --> [wpdm_members sid='"><script>alert(document.cookie)</script>'] <!-- Or using event handler in HTML attribute --> [wpdm_members sid='x onmouseover=alert(1)']

{"cve": {"id": "CVE-2026-5357", "sourceIdentifier": "[email protected]", "published": "2026-04-09T04:17:14.810", "lastModified": "2026-04-24T18:03:42.203", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "The Download Manager plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'sid' parameter of the 'wpdm_members' shortcode in versions up to and including 3.3.52. This is due to insufficient input sanitization and output escaping on the user-supplied 'sid' shortcode attribute. The sid parameter is extracted without sanitization in the members() function and stored via update_post_meta(), then echoed directly into an HTML id attribute in the members.php template without applying esc_attr(). 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 the 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/download-manager/tags/3.3.51/src/User/User.php#L175", "source": "[email protected]"}, {"url": "https://plugins.trac.wordpress.org/browser/download-manager/tags/3.3.51/src/User/views/members.php#L10", "source": "[email protected]"}, {"url": "https://plugins.trac.wordpress.org/browser/download-manager/trunk/src/User/User.php#L175", "source": "[email protected]"}, {"url": "https://plugins.trac.wordpress.org/browser/download-manager/trunk/src/User/views/members.php#L10", "source": "[email protected]"}, {"url": "https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=3501300%40download-manager&new=3501300%40download-manager&sfp_email=&sfph_mail=", "source": "[email protected]"}, {"url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/27fc81b0-c03a-4de7-bc38-791401d1685b?source=cve", "source": "[email protected]"}]}}