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HIGH

CVE-2026-87764

CVSS v3

8.8

HIGH

EPSS Score

—

exploit probability

CISA KEV

No

known exploited

Exploitation

—

SSVC status

Affected and fixed versions

Neither OSV.dev nor the vendor advisories we read list affected versions for CVE-2026-87764 yet.

Full record on NVD

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.

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Published
2026-10-11
Last Modified
2026-10-11

Frequently asked questions

What is CVE-2026-87764?

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.

Is CVE-2026-87764 actively exploited?

Active exploitation of CVE-2026-87764 has not been confirmed.

What is the CVSS score for CVE-2026-87764?

CVE-2026-87764 has a CVSS v3 base score of 8.8 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

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