CVE-2026-8787

{"id": "CVE-2026-8787", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "security@wordfence.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 8.8, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 2.8}]}, "published": "2026-05-27T07:16:15.060", "references": [{"url": "https://plugins.trac.wordpress.org/browser/admin-chat-box/tags/3.1.1/inc/ACB_AjaxHandler.php#L237", "source": "security@wordfence.com"}, {"url": "https://plugins.trac.wordpress.org/browser/admin-chat-box/tags/3.1.1/inc/ACB_AjaxHandler.php#L338", "source": "security@wordfence.com"}, {"url": "https://plugins.trac.wordpress.org/browser/admin-chat-box/trunk/inc/ACB_AjaxHandler.php#L237", "source": "security@wordfence.com"}, {"url": "https://plugins.trac.wordpress.org/browser/admin-chat-box/trunk/inc/ACB_AjaxHandler.php#L338", "source": "security@wordfence.com"}, {"url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/90783d75-a255-4133-ac7b-32e0a70c8c69?source=cve", "source": "security@wordfence.com"}], "vulnStatus": "Deferred", "weaknesses": [{"type": "Primary", "source": "security@wordfence.com", "description": [{"lang": "en", "value": "CWE-269"}]}], "descriptions": [{"lang": "en", "value": "The Firebase Support & Chat Management plugin for WordPress is vulnerable to privilege escalation in all versions up to, and including, 3.1.1. This is due to the `firebase_auth()` function authenticating the request as the WordPress user whose email is supplied in the `user_email` POST parameter without verifying ownership of that email (no Firebase ID token signature/issuer/audience verification). This makes it possible for authenticated attackers, with Subscriber-level access and above, to log in as an arbitrary existing user \u2014 including an Administrator \u2014 by submitting that user's email address to the `acb_firebase_auth` AJAX action, resulting in full account takeover."}], "lastModified": "2026-05-27T14:50:47.627", "sourceIdentifier": "security@wordfence.com"}