CVE-2026-1909 is a stored cross-site scripting vulnerability in the WaveSurfer-WP plugin for WordPress, affecting all versions up to and including 2.8.3. The issue stems from improper neutralization of input in the 'src' attribute of the plugin's audio 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 information disclosure or session hijacking. The vulnerability has a CVSS 3.1 base score of 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, and partial confidentiality and integrity impact.

An attacker with Contributor-level or higher access can inject persistent malicious scripts into pages via the audio shortcode's 'src' attribute. When other users view these pages, the scripts execute in their browsers, potentially leading to partial confidentiality and integrity compromise. There is no impact on availability. No known exploits have been reported in the wild.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, restrict Contributor-level access to trusted users only and consider disabling or removing the WaveSurfer-WP plugin if feasible to prevent exploitation.