CVE-2026-4353 is a stored cross-site scripting vulnerability in the CI HUB Connector WordPress plugin affecting all versions up to 1.2.106. The flaw exists due to improper neutralization of input in the 'id' attribute of the cihub_metadata shortcode, allowing authenticated users with Contributor or higher privileges to inject arbitrary web scripts. These scripts execute in the context of users who access the injected pages, potentially leading to session hijacking or other script-based attacks. The vulnerability has a CVSS 3.1 base score of 6.4 (medium severity) with an attack vector of network, low attack complexity, requiring privileges, no user interaction, and impacts confidentiality and integrity with no availability impact. No official fix or patch has been documented as of the published date.

An attacker with Contributor-level or higher access can inject persistent malicious scripts into pages via the vulnerable shortcode attribute. When other users view these pages, the scripts execute in their browsers, potentially compromising user sessions or data confidentiality and integrity. There is no indication of availability impact. 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 removing or disabling the vulnerable shortcode if possible. Monitor for updates from the vendor regarding patches or official mitigations.