{"id":"CVE-2026-87764","published":"2026-10-11T07:17:26.913","lastModified":"2026-10-13T20:36:00.850","description":"The BuddyPress Instant Chat WordPress plugin through 1.6 does not check that the sender of a chat message belongs to the conversation it is being added to, nor does it escape message content before outputting it back, allowing unauthenticated users to store arbitrary web scripts that will execute in the session of any member who later views that conversation.","cvssScore":8.8,"cvssSeverity":"HIGH","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","cwes":["CWE-79"],"vendors":[],"products":[],"references":[{"url":"https://wpscan.com/vulnerability/4c8836ae-5a1f-48ca-96fd-50a85e014cf6/","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":{"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.","remediation":"Upgrade to version 1.7 or later which includes proper sender validation and output escaping for chat messages.","detection":"No reliable host or network indicator is derivable from the published description.","tags":["xss","web","chat","session-hijack"],"model":"garnet-coder","analyzedAt":"2026-10-13T08:54:43.386Z"}}