CVE-2026-87764 BuddyPress Instant Chat - Stored XSS

BuddyPress Instant Chat WordPress plugin <= 1.6 contains a stored XSS caused by lack of sender verification and improper escaping of message content, letting unauthenticated attackers execute scripts in other users' sessions, exploit requires no authentication.

CVSS base score 8.8 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.28% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Stored XSS
Impact
Stored XSS
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Published
11 October 2026
Updated
15 October 2026
Weakness
CWE-79

Vendor fix

Update to the latest version of BuddyPress Instant Chat WordPress plugin.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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