The LightGallery WP plugin for WordPress, specifically versions using the bundled lightGallery library up to 2.8.3, contains a stored cross-site scripting vulnerability (CWE-79). This occurs due to improper neutralization of user-supplied input during web page generation, allowing authenticated users with Contributor-level privileges or higher to inject malicious scripts. These scripts execute in the context of other users viewing the injected pages, potentially leading to limited confidentiality and integrity impacts. The CVSS 3.1 base score is 6.4, reflecting network attack vector, low attack complexity, required privileges at the contributor level, no user interaction, and partial confidentiality and integrity impact with no availability impact.

An attacker with Contributor-level or higher privileges can inject malicious scripts that execute in the browsers of users who view the compromised pages. This can lead to partial disclosure of information or manipulation of content within the affected WordPress site. There is no indication of availability impact or known exploits in the wild at this time.

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 vulnerable LightGallery WP plugin if feasible. Monitor for updates from the vendor or plugin maintainers regarding patches or official mitigations.