CVE-2026-6672 is a stored Cross-Site Scripting vulnerability in the Affiliate Program Suite — SliceWP Affiliates WordPress plugin. It arises from improper neutralization of user-supplied input in the 'slicewp_affiliate_url' shortcode attributes, allowing authenticated users with contributor-level permissions or higher to inject arbitrary web scripts. These scripts persist in the content and execute in the context of users who access the injected pages. The vulnerability affects all versions up to and including 1.2.7. The CVSS 3.1 base score is 6.4, reflecting network attack vector, low attack complexity, privileges required at the contributor level, no user interaction, and impacts on confidentiality and integrity with no impact on availability. No vendor patch or official remediation is currently documented.

An attacker with contributor-level access or higher can inject persistent malicious scripts into pages via shortcode attributes. This can lead to unauthorized actions performed in the context of users viewing the affected pages, potentially compromising confidentiality and integrity of user data. There is no impact on availability. The vulnerability does not require user interaction to trigger once the malicious content is injected. No known exploitation in the wild has been 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 vulnerable shortcode if feasible. Monitor official vendor channels for updates and apply patches promptly once available.