What is CVE-2026-88793?

CVE-2026-88793 is a high-severity vulnerability in Youtube Embed, classified under Cross-site Scripting. CVSS score: 8.8/10. Published 2026-09-13.

How severe is CVE-2026-88793?

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

XSS in Youtube Embed

CVE-2026-88793

The YouTube Embed WordPress plugin from 10.0 to 10.3 does not perform any authorisation check on one of its AJAX actions, relying only on a nonce it prints on every front-end page, and does not escape the stored data before rendering it, allowing unauthenticated attackers to store arbitrary web scripts which will execute in the session of any user viewing the affected content, including an administrator.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.003 (19.9th percentile) — read the EPSS interpretation.

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.

Affected products

Unknown Youtube Embed

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

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

Frequently asked questions

What is CVE-2026-88793?: CVE-2026-88793 is a high-severity vulnerability in Youtube Embed, classified under Cross-site Scripting. CVSS score: 8.8/10. Published 2026-09-13.
How severe is CVE-2026-88793?: High severity. CVSS v3 base score is 8.8 out of 10.