CVE-2026-86798 HootBoard <= 3.1.4 - Unauthenticated Stored XSS via Board Configuration REST Endpoint
Unauthenticated attackers can inject malicious scripts via REST endpoints, leading to script execution in victim browsers, including administrators.
- 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-2026-86798?
CVE-2026-86798 is a high-severity cross-site scripting vulnerability in Unknown HootBoard, 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 HootBoard WordPress plugin through 3.1.4 does not perform any authorisation check on some of its REST endpoints, and does not escape the values stored through them before outputting them in a public page, allowing unauthenticated users to inject arbitrary web scripts that will execute in the browser of anyone visiting that page, including administrators.
Weakness: CWE-79
Which versions are affected by CVE-2026-86798?
How do I fix CVE-2026-86798?
No fix has been published for CVE-2026-86798 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-2026-86798 being exploited?
There is no known exploitation of CVE-2026-86798 in the wild and no public exploit code.
Sources
Also known as GHSA-8jxp-9jrv-6qv4.