The vulnerability CVE-2025-31462 affects rzfarrell CGM Event Calendar through improper input neutralization during web page generation, leading to reflected cross-site scripting (XSS). This allows attackers to inject and execute arbitrary scripts in users' browsers when they interact with crafted URLs or inputs. The affected versions include all releases up to 0.8.5. The CVSS 3.1 base score is 7.1, reflecting network attack vector, low attack complexity, no privileges required, user interaction required, scope changed, and impacts on confidentiality, integrity, and availability at a low to low level. 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 context of the victim's browser, potentially leading to information disclosure, session hijacking, or other client-side impacts. The CVSS vector indicates that the attack can be performed remotely without privileges but requires user interaction. The scope is changed, meaning the vulnerability affects components beyond the initially vulnerable component. The impact on confidentiality, integrity, and availability is rated as low, but combined with the attack vector and scope, the overall severity is high.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, users should consider applying input validation or output encoding workarounds if feasible. Additionally, users should exercise caution with untrusted input and avoid clicking suspicious links that could trigger reflected XSS attacks. Monitor the vendor's communications for updates on patches or official mitigations.