CVE-2024-4095 is a stored cross-site scripting vulnerability in the Collapse-O-Matic WordPress plugin by baden03. The issue affects all versions up to and including 1.8.5.7. It results from improper neutralization of input in the 'expand' and 'expandsub' shortcodes, allowing authenticated users with contributor or higher privileges to inject arbitrary web scripts. These scripts execute in the context of any user viewing the compromised page, potentially leading to session hijacking or other script-based attacks. The vulnerability requires low attack complexity and no user interaction beyond viewing the page. The CVSS 3.1 vector is AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N, reflecting network attack vector, low complexity, privileges required, no user interaction, scope changed, and limited confidentiality and integrity impact.

An attacker with contributor-level or higher access can inject malicious scripts into pages via vulnerable shortcodes. These scripts execute in the browsers of users who visit the injected pages, potentially compromising user sessions or performing unauthorized actions within the context of the affected site. The impact affects confidentiality and integrity but does not affect availability. No known exploits are currently reported in the wild.

No official patch or remediation is currently available for this vulnerability. Users should monitor the vendor's advisory channels for updates. Until a fix is released, restrict contributor-level access to trusted users only and consider disabling or removing the Collapse-O-Matic plugin if possible to mitigate risk.