What is CVE-2026-86798?

CVE-2026-86798 is a high-severity vulnerability in Hootboard, classified under Cross-site Scripting. CVSS score: 8.8/10. Published 2026-10-11.

How severe is CVE-2026-86798?

High severity. CVSS v3 base score is 8.8 out of 10.

XSS in Hootboard

CVE-2026-86798

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.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2026-10-11 · last modified 2026-10-11.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Hootboard

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

wpscan.com/vulnerability/a0cfbbb7-4cc5-4ec0-b420-e249204fcd46/ (technical-description, exploit, vdb-entry)

Frequently asked questions

What is CVE-2026-86798?: CVE-2026-86798 is a high-severity vulnerability in Hootboard, classified under Cross-site Scripting. CVSS score: 8.8/10. Published 2026-10-11.
How severe is CVE-2026-86798?: High severity. CVSS v3 base score is 8.8 out of 10.