{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-89093", "assignerOrgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599", "state": "PUBLISHED", "assignerShortName": "Wordfence", "dateReserved": "2026-09-10T20:32:26.852Z", "datePublished": "2026-09-19T02:27:11.997Z", "dateUpdated": "2026-09-19T02:27:11.997Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599", "shortName": "Wordfence", "dateUpdated": "2026-09-19T02:27:11.997Z"}, "affected": [{"vendor": "wordplus", "product": "Better Messages \u2013 Chat Rooms, Group Chat, Private Messages & AI Chat Bots", "versions": [{"version": "0", "status": "affected", "lessThanOrEqual": "2.15.33", "versionType": "semver"}], "defaultStatus": "unaffected"}], "descriptions": [{"lang": "en", "value": "The Better Messages \u2013 Chat Rooms, Group Chat, Private Messages & AI Chat Bots plugin for WordPress is vulnerable to Information Exposure by Spoofing in all versions up to, and including, 2.15.33. This is due to the `is_ai_bot_user()` function identifying privileged internal AI bot accounts by performing a prefix check for `'ai-chat-bot-'` against a guest record's stored IP address, which is populated verbatim from the client-controlled `X-Real-IP` request header during unauthenticated guest registration. This makes it possible for unauthenticated attackers to register a guest identity that the plugin treats as its own internal AI bot, bypassing the per-room role allowlist, draft-status check, and join filters \u2014 which are all short-circuited by the bot check in `user_can_join()` and `user_can_read()` \u2014 to join administrator-restricted chat rooms, post messages into them, and read the private message history of other users."}], "title": "Better Messages <= 2.15.33 - Unauthenticated Information Exposure Spoofing via 'X-Real-IP' Header via /guests/register", "references": [{"url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/df28ecd7-d463-48b7-95e6-8adc9f34d6bd?source=cve"}, {"url": "https://plugins.trac.wordpress.org/browser/bp-better-messages/tags/2.15.33/inc/functions.php#L4155"}, {"url": "https://plugins.trac.wordpress.org/browser/bp-better-messages/tags/2.15.33/inc/chats.php#L2145"}, {"url": "https://plugins.trac.wordpress.org/browser/bp-better-messages/tags/2.15.33/inc/chats.php#L2168"}, {"url": "https://plugins.trac.wordpress.org/browser/bp-better-messages/tags/2.15.33/inc/chats.php#L2196"}, {"url": "https://plugins.trac.wordpress.org/browser/bp-better-messages/tags/2.15.33/inc/guests.php#L577"}, {"url": "https://plugins.trac.wordpress.org/browser/bp-better-messages/tags/2.15.33/inc/guests.php#L467"}, {"url": "https://plugins.trac.wordpress.org/browser/bp-better-messages/tags/2.15.33/inc/guests.php#L311"}, {"url": "https://plugins.trac.wordpress.org/changeset?old_path=bp-better-messages%2Ftags%2F2.15.33%2Finc%2Ffunctions.php&new_path=bp-better-messages%2Ftags%2F3.0.0%2Finc%2Ffunctions.php"}], "problemTypes": [{"descriptions": [{"lang": "en", "description": "CWE-287 Improper Authentication", "cweId": "CWE-287", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"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"}}], "credits": [{"lang": "en", "type": "finder", "value": "Jonah Burgess (CryptoCat)"}], "timeline": [{"time": "2026-09-10T20:48:32.000Z", "lang": "en", "value": "Vendor Notified"}, {"time": "2026-09-18T13:53:09.000Z", "lang": "en", "value": "Disclosed"}]}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Better Messages \u2013 Chat Rooms, Group Chat, Private Messages & AI Chat Bots", "vendor": "wordplus", "versions": [{"lessThanOrEqual": "2.15.33", "status": "affected", "version": "0", "versionType": "semver"}]}], "source": "security@wordfence.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "The Better Messages \u2013 Chat Rooms, Group Chat, Private Messages & AI Chat Bots plugin for WordPress is vulnerable to Information Exposure by Spoofing in all versions up to, and including, 2.15.33. This is due to the `is_ai_bot_user()` function identifying privileged internal AI bot accounts by performing a prefix check for `'ai-chat-bot-'` against a guest record's stored IP address, which is populated verbatim from the client-controlled `X-Real-IP` request header during unauthenticated guest registration. This makes it possible for unauthenticated attackers to register a guest identity that the plugin treats as its own internal AI bot, bypassing the per-room role allowlist, draft-status check, and join filters \u2014 which are all short-circuited by the bot check in `user_can_join()` and `user_can_read()` \u2014 to join administrator-restricted chat rooms, post messages into them, and read the private message history of other users."}], "id": "CVE-2026-89093", "lastModified": "2026-09-19T03:17:16.443", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 1.4, "source": "security@wordfence.com", "type": "Primary"}]}, "published": "2026-09-19T03:17:16.443", "references": [{"source": "security@wordfence.com", "url": "https://plugins.trac.wordpress.org/browser/bp-better-messages/tags/2.15.33/inc/chats.php#L2145"}, {"source": "security@wordfence.com", "url": "https://plugins.trac.wordpress.org/browser/bp-better-messages/tags/2.15.33/inc/chats.php#L2168"}, {"source": "security@wordfence.com", "url": "https://plugins.trac.wordpress.org/browser/bp-better-messages/tags/2.15.33/inc/chats.php#L2196"}, {"source": "security@wordfence.com", "url": "https://plugins.trac.wordpress.org/browser/bp-better-messages/tags/2.15.33/inc/functions.php#L4155"}, {"source": "security@wordfence.com", "url": "https://plugins.trac.wordpress.org/browser/bp-better-messages/tags/2.15.33/inc/guests.php#L311"}, {"source": "security@wordfence.com", "url": "https://plugins.trac.wordpress.org/browser/bp-better-messages/tags/2.15.33/inc/guests.php#L467"}, {"source": "security@wordfence.com", "url": "https://plugins.trac.wordpress.org/browser/bp-better-messages/tags/2.15.33/inc/guests.php#L577"}, {"source": "security@wordfence.com", "url": "https://plugins.trac.wordpress.org/changeset?old_path=bp-better-messages%2Ftags%2F2.15.33%2Finc%2Ffunctions.php&new_path=bp-better-messages%2Ftags%2F3.0.0%2Finc%2Ffunctions.php"}, {"source": "security@wordfence.com", "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/df28ecd7-d463-48b7-95e6-8adc9f34d6bd?source=cve"}], "sourceIdentifier": "security@wordfence.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-287"}], "source": "security@wordfence.com", "type": "Primary"}]}

{}

{"created": "2026-09-19T11:00:08.890356+00:00", "updated": "2026-09-19T11:00:08.890362+00:00", "vendors": []}