The vulnerability CVE-2025-49963 affects growniche Simple Stripe Checkout (<= 1.1.28) and is characterized as a reflected cross-site scripting (XSS) issue caused by improper neutralization of input during web page generation. This allows attackers to inject malicious scripts that execute when a victim interacts with crafted URLs or input, potentially leading to partial compromise of confidentiality, integrity, and availability. The CVSS 3.1 base score is 7.1, reflecting network attack vector, low attack complexity, no privileges required, user interaction required, and scope change with low impact on confidentiality, integrity, and availability. No patch or vendor advisory with remediation details is currently available.

Successful exploitation of this reflected XSS vulnerability can allow attackers to execute arbitrary scripts in the context of the victim's browser, potentially leading to theft of sensitive information, session hijacking, or other malicious actions affecting confidentiality, integrity, and availability to a limited extent. The CVSS score of 7.1 indicates a high severity but with low impact on each security property individually.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, users should consider implementing input validation and output encoding as temporary mitigations to reduce the risk of reflected XSS. Avoid using affected versions in untrusted environments and monitor for updates from growniche regarding patches or official fixes.