The vulnerability CVE-2025-66091 in the Design Stylish Cost Calculator plugin arises from improper neutralization of input during web page generation, resulting in a DOM-based Cross-site Scripting (XSS) flaw. This allows an attacker with low privileges and requiring user interaction to potentially execute malicious scripts in the context of the affected application. The vulnerability affects versions up to 8.1.5. The CVSS 3.1 base score is 6.5, indicating a medium severity with network attack vector, low attack complexity, and partial impact on confidentiality, integrity, and availability. No patch or vendor advisory is currently available to confirm remediation status.

Successful exploitation of this vulnerability could allow an attacker to execute arbitrary scripts in the victim's browser, potentially leading to partial disclosure of information, modification of data, or disruption of service within the context of the affected application. The attack requires user interaction and low privileges, and the scope is changed, meaning the impact can extend beyond the vulnerable component. There are no known exploits in the wild at this time.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, users should exercise caution with untrusted input and consider applying any available temporary mitigations recommended by the vendor once published. Monitor vendor channels for updates regarding patches or official mitigations.