CVE-2026-0737 is a stored cross-site scripting vulnerability in the WP Shortcodes Plugin - Shortcodes Ultimate for WordPress. The vulnerability is due to improper neutralization of input in the 'src' attribute of the su_lightbox shortcode, allowing authenticated contributors or higher to inject malicious scripts. These scripts execute in the context of users who view the compromised pages. The CVSS 3.1 base score is 6.4 (medium severity), with network attack vector, low attack complexity, privileges required at the contributor level, no user interaction needed, and impacts on confidentiality and integrity but not availability. No official fix or patch has been documented by the vendor as of the published date.

An authenticated attacker with contributor-level access or higher can inject persistent malicious scripts into pages via the su_lightbox shortcode's 'src' attribute. These scripts execute in the browsers of users who access the infected pages, potentially leading to unauthorized disclosure of information or modification of content. The vulnerability does not affect availability. There are no known public exploits currently reported.

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 removing or disabling the su_lightbox shortcode if feasible. Monitor vendor channels for updates or patches addressing this vulnerability.