CVE-2025-10165 is a stored cross-site scripting vulnerability in the AP Background plugin for WordPress, affecting all versions up to 3.8.2. The issue is due to improper neutralization of input during web page generation (CWE-79), specifically in the 'adv_parallax_back' shortcode. Authenticated attackers with contributor-level access or higher can inject arbitrary web scripts that execute in the context of other users viewing the injected pages. The CVSS 3.1 base score is 6.4 (medium severity), reflecting network attack vector, low attack complexity, required privileges at the contributor level, no user interaction, and impacts on confidentiality and integrity with no availability impact.

Successful exploitation allows authenticated contributors or higher to inject persistent malicious scripts into pages, potentially leading to unauthorized actions or data exposure in the context of other users viewing those pages. The impact affects confidentiality and integrity but does not affect availability. There are no known exploits in the wild as of the published date.

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