PT-2026-43523 · Esiteq · Responsive Video Embed

Published 2026-05-27 · Updated 2026-05-27 · CVE-2026-8877

Mitre

CVSS v3.1

6.4

Medium

Base vector

AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

The Responsive Video Embedder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'rem video' shortcode in versions up to, and including, 0.1. This is due to insufficient input sanitization and output escaping on user supplied attributes (notably 'id' and 'list') in the video shortcode() function, which are concatenated directly into an HTML iframe's src attribute without escaping. 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.

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2026-8877

Affected Products

Responsive Video Embed

References · 4

• https://nvd.nist.gov/vuln/detail/CVE-2026-8877 · Security Note
• https://wordfence.com/threat-intel/vulnerabilities/id/00f5cf90-cc63-4e51-b1be-1152abefc59d?source=cve · Note
• https://plugins.trac.wordpress.org/browser/responsive-video-embedder/trunk/responsive-video-embedder.php#L152 · Note
• https://plugins.trac.wordpress.org/browser/responsive-video-embedder/trunk/responsive-video-embedder.php#L167 · Note