The WP Posts Carousel plugin for WordPress, developed by teastudio.pl, contains a stored cross-site scripting vulnerability identified as CVE-2025-30920. This vulnerability results from improper input sanitization during web page generation, which can allow an attacker with limited privileges and requiring user interaction to inject malicious scripts that execute in the context of other users. The issue affects all versions up to 1.3.7. The CVSS 3.1 vector indicates network attack vector, low attack complexity, low privileges required, user interaction required, and impacts on confidentiality, integrity, and availability classified as low to low to low respectively, combined to a medium overall severity.

Successful exploitation of this vulnerability could allow an attacker to execute arbitrary scripts in the context of the affected site, potentially leading to information disclosure, session hijacking, or other malicious actions impacting confidentiality, integrity, and availability. However, exploitation requires user interaction and limited privileges, which reduces the overall risk. There are no reports of active exploitation in the wild.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no official patch or fix information is provided, users should monitor for updates from teastudio.pl or the plugin repository. Until a fix is available, consider restricting plugin usage or applying temporary mitigations such as input validation or disabling vulnerable features if feasible.