The Weluka Lite plugin for WordPress suffers from a stored XSS vulnerability due to improper neutralization of input during web page generation. Specifically, the 'weluka-map' shortcode does not sufficiently sanitize or escape user-supplied attributes, allowing authenticated contributors or higher to inject arbitrary 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 affects all versions up to and including 1.0.3.

An attacker with contributor-level or higher access can inject persistent malicious scripts into pages via the vulnerable shortcode. These scripts execute in the browsers of users who visit the infected pages, potentially compromising user sessions and data confidentiality. The vulnerability does not impact availability and requires some level of authenticated access, limiting its exploitation scope.

No official patch or remediation is currently documented for this vulnerability. Users should monitor the vendor's advisory channels for updates and consider restricting contributor-level access until a fix is available. Applying strict input validation or disabling the 'weluka-map' shortcode may reduce risk temporarily. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance.