CVE-2026-1888 is a stored cross-site scripting vulnerability in the Docus – YouTube Video Playlist WordPress plugin, affecting all versions up to 1.0.6. The issue is due to improper neutralization of input during web page generation (CWE-79), specifically insufficient sanitization and output escaping of user-supplied attributes in the 'docusplaylist' shortcode. Authenticated users with Contributor-level privileges or higher can exploit this to inject arbitrary scripts that execute in the context of any user viewing the injected page. The CVSS 3.1 base score is 6.4 (medium), with network attack vector, low attack complexity, privileges required at low level, no user interaction, and impacts confidentiality and integrity with no availability impact.

An attacker with Contributor-level access or higher can inject persistent malicious scripts into pages via the vulnerable shortcode. These scripts execute in the browsers of users who visit the compromised pages, potentially leading to data theft, session hijacking, or other client-side attacks affecting confidentiality and integrity. There is no direct impact on system availability. No known exploits in the wild have been reported.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict Contributor-level access to trusted users only and consider disabling or removing the Docus – YouTube Video Playlist plugin if possible. Monitor official htplugins communications for updates or patches addressing this vulnerability.