CVE-2026-8898 is a stored cross-site scripting vulnerability in the Events In City WordPress plugin by ruchit47. The flaw exists in the org_event_scode() function, where user-supplied attributes such as 'organizer_id', 'width', 'height', 'transparency', 'header', 'border', and 'layout' are concatenated directly into HTML attributes without proper escaping (esc_attr()). This allows authenticated users with contributor-level privileges or higher to inject arbitrary JavaScript code that executes in the context of any user viewing the page containing the malicious shortcode. The vulnerability affects versions up to and including 3.0. The CVSS vector indicates network attack vector, low attack complexity, low privileges required, no user interaction, and impacts confidentiality and integrity with no impact on availability.

An attacker with contributor-level access or higher can inject persistent malicious scripts into pages via shortcode attributes. This can lead to unauthorized actions performed in the context of other users, potentially compromising user data confidentiality and integrity. The vulnerability does not affect availability. There are no reports of active exploitation in the wild.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict contributor-level access to trusted users only and consider removing or disabling the Events In City plugin if possible. Monitor official vendor channels for updates or patches addressing this vulnerability.