CVE-2026-4852 is a stored cross-site scripting vulnerability in the Image Source Control Lite – Show Image Credits and Captions WordPress plugin, affecting all versions up to 3.9.1. The vulnerability is due to improper neutralization of input in the 'Image Source' attachment field, allowing authenticated users with Author-level permissions or higher to inject arbitrary web scripts. These scripts execute in the context of users who access the injected pages, potentially compromising user sessions or data. The CVSS 3.1 base score is 6.4, reflecting a medium severity with network attack vector, low attack complexity, and privileges required at the Author level. No vendor advisory or patch information is currently available, and no exploits are known in the wild.

An attacker with Author-level or higher access can inject malicious scripts into pages via the vulnerable 'Image Source' field. When other users view these pages, the scripts execute in their browsers, potentially leading to session hijacking, unauthorized actions, or theft of sensitive information. The vulnerability does not impact availability and requires authenticated access, limiting its scope. No known active exploitation has been reported.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, restrict Author-level access to trusted users only and consider disabling or replacing the plugin if possible. Monitor updates from the vendor for a security patch addressing this vulnerability.