CVE-2026-87764 Details
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.
A stored cross-site scripting vulnerability has been identified in the BuddyPress Instant Chat WordPress plugin, affecting versions through 1.6. The issue arises because the plugin does not verify that the sender of a chat message is part of the conversation to which the message is being added. Additionally, it fails to properly escape message content before displaying it, allowing unauthenticated users to inject arbitrary web scripts. These scripts are executed in the session of any member who subsequently views the conversation.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Oct 11, 2026CISA-ADP
Assessed Oct 11, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://wpscan.com/vulnerability/4c8836ae-5a1f-48ca-96fd-50a85e014cf6/ | [email protected] | AdvisoryExploitPartial ContentRemedy |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-79 | Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') | CISA-ADP |
Affected Products
| Product | Versions |
|---|---|
| BuddyPress Instant Chat | <= 1.6 |
CPE
Remediation
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Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Oct 11, 2026 | CVE Modified | CISA-ADP |
| Oct 11, 2026 | New CVE Received | [email protected] |