What is CVE-2026-86790?

CVE-2026-86790 is a medium-severity vulnerability in Wp Highlight Box, classified under Cross-site Scripting. CVSS score: 6.8/10. Published 2026-09-12.

How severe is CVE-2026-86790?

Medium severity. CVSS v3 base score is 6.8 out of 10.

XSS in Wp Highlight Box

CVE-2026-86790

The WP Highlight Box WordPress plugin through 1.0 does not escape some shortcode attributes before outputting them in a page where the shortcode is embedded, which could allow users with the contributor role and above to perform Stored Cross-Site Scripting attacks.

Vulnerability class: XSS (Cross-Site Scripting)

CVSS v3 metric

CVSS v3 base score 6.8 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H.

Affected products

Unknown Wp Highlight Box

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

contact@wpscan.com (technical-description, exploit, vdb-entry)

Frequently asked questions

What is CVE-2026-86790?: CVE-2026-86790 is a medium-severity vulnerability in Wp Highlight Box, classified under Cross-site Scripting. CVSS score: 6.8/10. Published 2026-09-12.
How severe is CVE-2026-86790?: Medium severity. CVSS v3 base score is 6.8 out of 10.