The Link Library plugin for WordPress contains a stored XSS vulnerability (CWE-79) due to improper neutralization of input during web page generation. This allows authenticated users with Contributor or higher privileges to inject arbitrary scripts via the Link Additional Parameters field. These scripts execute in the context of users who access the injected pages, potentially leading to session hijacking or other script-based attacks. The vulnerability affects all versions up to 7.7.3. No known exploits are reported in the wild, and no patch or vendor advisory has been provided yet.

An attacker with Contributor-level or higher access can inject persistent malicious scripts into pages via the vulnerable parameter. This can lead to unauthorized actions performed in the context of other users viewing the affected pages, such as session theft or defacement. The vulnerability does not impact availability but compromises confidentiality and integrity to a limited extent. There are no reports of active exploitation in the wild at this time.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict Contributor-level access to trusted users only and consider disabling or limiting use of the Link Additional Parameters feature to reduce exposure.