Quick answers
- Is CVE-2026-87764 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-87764 being exploited in the wild.
- How severe is CVE-2026-87764?
- High severity, with a CVSS score of 8.8, published 11 October 2026.
- Which products and versions are affected?
- Unknown BuddyPress Instant Chat through 1.6.
- Is there a fix for CVE-2026-87764?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-87764 attacked?
- It is attacked over the network, in a web application.
- Am I affected by CVE-2026-87764?
- Check whether you run Unknown BuddyPress Instant Chat at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
The vulnerability is a stored XSS flaw in the BuddyPress Instant Chat plugin arising from two missing security controls: lack of sender validation to verify the message author belongs to the conversation, and failure to escape message content on output. An unauthenticated attacker can inject arbitrary HTML and JavaScript into chat messages; the payload persists in the database and executes in the context of any authenticated user viewing that conversation. No fix is currently available.
Affected products
- <unknown> BuddyPress Instant Chat through 1.6
Timeline
- 2026-10-09: disclosed