CVE-2026-0552 is a stored cross-site scripting vulnerability in the Simple Shopping Cart plugin for WordPress, affecting all versions up to and including 5.2.4. The issue arises from improper neutralization of user-supplied input in the 'wpsc_display_product' shortcode, allowing authenticated users with contributor-level permissions or higher to inject arbitrary web scripts. These scripts execute in the context of any user who accesses the injected page, potentially leading to session hijacking or other script-based attacks. The CVSS 3.1 base score is 6.4, reflecting a network attack vector with low attack complexity, requiring privileges, no user interaction, and impacting confidentiality and integrity with scope change.

An attacker with contributor-level access or higher can inject persistent malicious scripts into pages via the vulnerable shortcode. This can lead to unauthorized script execution in the context of other users viewing the page, potentially compromising user sessions or data confidentiality and integrity. There is no indication of impact to availability. No known exploits have been reported in the wild.

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 Simple Shopping Cart plugin if feasible. Monitor vendor channels for updates regarding patches or official mitigations.