CVE-2026-1904 is a stored cross-site scripting vulnerability in the Simple Wp colorfull Accordion plugin for WordPress, affecting all versions up to 1.0. The issue is due to improper neutralization of input in the 'title' parameter of the 'accordion' shortcode, allowing authenticated users with Contributor-level privileges or higher to inject arbitrary web scripts. These scripts execute in the context of users who view the injected pages, potentially leading to information disclosure or session hijacking. The vulnerability has a CVSS 3.1 score of 6.4, reflecting a medium severity with network attack vector, low attack complexity, and no user interaction required.

An attacker with Contributor-level access or higher can exploit this vulnerability to inject persistent malicious scripts into pages via the 'title' parameter. These scripts execute in the browsers of users who visit the affected pages, potentially leading to information disclosure or other impacts related to cross-site scripting. The vulnerability does not affect availability and requires authenticated access.

No official patch or remediation is currently available for this vulnerability. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is released, limit Contributor-level access to trusted users and consider disabling or removing the Simple Wp colorfull Accordion plugin if possible.