CVE-2026-19797 is a reflected cross-site scripting vulnerability in the User Access Manager WordPress plugin, specifically through the 'tab_group_section' parameter. The vulnerability exists in all versions up to and including 2.3.18 due to improper neutralization of input during web page generation, allowing unauthenticated attackers to inject malicious scripts that execute in the context of a victim's browser when they click a crafted link. The CVSS 3.1 score is 6.1 (medium severity) with vector AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N, indicating network attack vector, low attack complexity, no privileges required, user interaction required, scope changed, and low impact on confidentiality and integrity, no impact on availability.

Successful exploitation can lead to execution of arbitrary scripts in the context of the victim's browser, potentially allowing theft of user credentials, session tokens, or other sensitive information accessible to the browser. The vulnerability requires user interaction (clicking a malicious link) and affects confidentiality and integrity with no impact on availability. There are no known exploits in the wild at this time.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, users should avoid clicking suspicious links that could exploit this vulnerability. Monitor official gm_alex or WordPress plugin sources for updates or patches addressing this issue.