What’s Vulnerable › Vulnerabilities
CVE-2026-88793: YouTube Embed 10.0 - 10.3 - Unauthenticated Stored XSS via youram_server
- Severity: high (CVSS 8.8 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.5% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-09-13 · updated 2026-09-14
- Weakness: CWE-79
Description
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.
Affected products
- YouTube Embed: from 10.0 through 10.3
References
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