CVE-2026-1608: Video Onclick <= 0.4.7 - Authenticated (Contributor+) Stored Cross-Site Scripting via Shortcode

Severity: medium (CVSS 6.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-02-07 · updated 2026-06-17
Weakness: CWE-79

Description

The Video Onclick plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's `youtube` shortcode in all versions up to, and including, 0.4.7 due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

Affected products

tigor4eg Video Onclick: through 0.4.7

References

https://plugins.trac.wordpress.org/browser/video-onclick/tags/0.4.7/video-onclick.php#L109
https://www.wordfence.com/threat-intel/vulnerabilities/id/73ddf729-da69-4d0b-866f-34a92ec72800?source=cve

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