The gopiplus Vertical scroll image slideshow gallery WordPress plugin suffers from a stored cross-site scripting vulnerability (CWE-79) via the 'width' parameter. This flaw allows authenticated users with Contributor or higher privileges to inject arbitrary web scripts into pages. The vulnerability arises from insufficient input sanitization and output escaping, affecting all plugin versions up to 11.1. The CVSS 3.1 base score is 6.4 (AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N), reflecting network attack vector, low attack complexity, requiring privileges, no user interaction, and partial impact on confidentiality and integrity with no availability impact. No patch or vendor advisory is currently provided, and no exploits are known in the wild.

Successful exploitation allows an authenticated user with Contributor-level access or higher to inject persistent malicious scripts into pages generated by the plugin. These scripts execute in the context of users viewing the infected pages, potentially leading to partial confidentiality and integrity compromise. There is no impact on availability. The vulnerability could facilitate actions such as session hijacking or unauthorized actions performed by victim users, but specific attack scenarios are not detailed in the provided data.

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 replacing the affected plugin to prevent exploitation. Monitor for updates from the vendor regarding patches or official mitigations.