Better Messages <= 2.15.33 — Unauthenticated Information Exposure Spoofing via 'X-Real-IP' Header via /guests/register
CVE-2026-89093Published · Updated Action summary
Affected: ≤2.15.33Update to 3.0.0 or newer
All remediation steps- Severity
- Medium5.3
- CVSS
- 5.3CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:NWhat does this vector mean?
AV:NAttack vector- Network
AC:LAttack complexity- Low
PR:NPrivileges required- None
UI:NUser interaction- None
S:UScope- Unchanged
C:LConfidentiality- Low
I:NIntegrity- None
A:NAvailability- None
- Weakness
- CWE-287 Improper Authentication
- Required access
- No account needed
- Exploit prediction (EPSS)
- No score
- CISA KEV
- Not listed
On this page8
Am I affected?
Better Messages – Chat Rooms, Group Chat, Private Messages & AI Chat Bots bp-better-messages
- Affected≤ 2.15.33
- Patched in3.0.0
Update to 3.0.0 or newer.
You are affected if you run ≤ 2.15.33. Version 3.0.0 and later are not affected by this issue.
- Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under Better Messages – Chat Rooms, Group Chat, Private Messages & AI Chat Bots.
- No admin access? Run a passive check of your site. It reads public files only.
- No account is needed to exploit this. Treat any exposed site on an affected version as at risk.
What to do
- Update to version 3.0.0, or a newer patched version
- Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
- Watch Better Messages – Chat Rooms, Group Chat, Private Messages & AI Chat Bots to get an email when the next vulnerability is published.
Advisory
Source description from Wordfence Intelligence, credited to Jonah Burgess (CryptoCat).
The Better Messages – 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 — which are all short-circuited by the bot check in `user_can_join()` and `user_can_read()` — to join administrator-restricted chat rooms, post messages into them, and read the private message history of other users.
Exploits & references
Proof-of-concept & detection
No public proof-of-concept or detection template is known for this vulnerability.
Advisories & patches
- Advisorywordfence.com
Related CVEs
More in Better Messages – Chat Rooms, Group Chat, Private Messages & AI Chat Bots
All 27| Severity | Vulnerability | CVE | Published |
|---|---|---|---|
| Medium6.4 | Authenticated (Subscriber+) Stored Cross-Site Scripting ≤3.2.1Update to 3.2.2 | CVE-2026-124257 | |
| High7.2 | Unauthenticated Stored Cross-Site Scripting ≤3.1.3Update to 3.1.4 | CVE-2026-114179 | |
| Medium6.4 | Authenticated (Subscriber+) Stored DOM-Based Cross-Site Scripting via User Display Name ≤3.0.4Update to 3.0.5 | CVE-2026-94376 | |
| Medium6.5 | Authenticated (Subscriber+) SQL Injection via 'group_id' Message Meta Parameter ≤3.0.4Update to 3.0.5 | CVE-2026-93899 | |
| Medium6.5 | Missing Authorization to Authenticated (Custom+) Chat-Room Transcript Disclosure via '/thread/<id>' REST Endpoint ≤2.15.33Update to 3.0.0 | CVE-2026-89334 |
- Medium6.4Authenticated (Subscriber+) Stored Cross-Site Scripting
≤3.2.1Update to 3.2.2
- High7.2Unauthenticated Stored Cross-Site Scripting
≤3.1.3Update to 3.1.4
- Medium6.4Authenticated (Subscriber+) Stored DOM-Based Cross-Site Scripting via User Display Name
≤3.0.4Update to 3.0.5
- Medium6.5Authenticated (Subscriber+) SQL Injection via 'group_id' Message Meta Parameter
≤3.0.4Update to 3.0.5
- Medium6.5Missing Authorization to Authenticated (Custom+) Chat-Room Transcript Disclosure via '/thread/<id>' REST Endpoint
≤2.15.33Update to 3.0.0
Timeline
CVE published
Severity medium, CVSS 5.3
Record last updated
Sources & licenses
Wordfence record- Vulnerability data
- Wordfence Intelligence. [object Object] Licensed under the CC BY-SA 4.0.
- CVE® identifiers
- [object Object]. Used under the CVE Program. CVE® is a registered trademark of The MITRE Corporation.
- CVSS / CWE
- National Vulnerability Database (NVD), shown unmodified. This product uses the NVD API but is not endorsed or certified by the NVD.
- VulnCrest content
- Summary, remediation guidance and page layout © VulnCrest. Not sourced from NVD.