CVE-2026-87764 BuddyPress Instant Chat <= 1.6 - Unauthenticated Stored XSS via Chat Message
Unauthenticated attackers can inject malicious scripts into chat messages, leading to code execution in victim sessions.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-87764?
CVE-2026-87764 is a high-severity cross-site scripting vulnerability in Unknown BuddyPress Instant Chat, published on 11 Oct 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official 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.
Weakness: CWE-79
Which versions are affected by CVE-2026-87764?
How do I fix CVE-2026-87764?
No fix has been published for CVE-2026-87764 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-87764 being exploited?
There is no known exploitation of CVE-2026-87764 in the wild and no public exploit code.
Sources
Also known as GHSA-q3fq-h679-wfvh.