CVE-2026-87764

Summary

The BuddyPress Instant Chat plugin allows unauthenticated users to inject malicious scripts into chat conversations, which then execute in the sessions of any user who views those conversations. This cross-site scripting vulnerability can lead to full session hijacking and unauthorized access to user accounts.

Exploitability

Exploitation is relatively straightforward as it requires only sending a specially crafted message to any conversation, with no authentication needed, though the attack is user-initiated via a click on the vulnerable conversation.

Blast radius

The impact could be significant across all users who view affected conversations, potentially affecting dozens or hundreds of users depending on the size of the community and conversation volume.

Detection

No reliable host or network indicator is derivable from the published description.

Prioritized remediation

Upgrade to version 1.7 or later which includes proper sender validation and output escaping for chat messages.

Analysis generated locally by garnet-coder (no data left the box). AI-assisted — verify against primary sources before acting.