Medium severity · published Sep 16, 2026
CVE-2026-18555
Better Messages – Chat Rooms, Group Chat, Private Messages & AI Chat Bots plugin for WordPress <= 2.15.22 - Reflected Cross-Site Scripting via 'icn' Parameter
6.1
CVSS
0.3%
EPSS
No
On KEV
Description
The Better Messages – Chat Rooms, Group Chat, Private Messages & AI Chat Bots plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the 'icn' parameter in all versions up to, and including, 2.15.22 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 21% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
BM
Better Messages – Chat Rooms, Group Chat, Private Messages & AI Chat Bots · wordplus
through 2.15.22 · source: vendor
Affected product
BM
Better Messages – Chat Rooms, Group Chat, Private Messages & AI Chat Bots
wordplus
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-18555
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-18555
plugins.trac.wordpress.org
https://plugins.trac.wordpress.org/changeset/3634693/bp-better-messages/tags/2.15.23/inc/shortcodes.php
www.wordfence.com
https://www.wordfence.com/threat-intel/vulnerabilities/id/e24a672b-0ba4-4061-971d-255a61aed60b?source=cve
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