CVE-2026-66584: CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in Code for Recovery 12 Step Meeting List

CVE-2026-66584 is an unauthenticated cross-site scripting (XSS) vulnerability in Code for Recovery's 12 Step Meeting List software, affecting all versions up to and including 3.19.16. The vulnerability stems from improper neutralization of input during web page generation (CWE-79), allowing attackers to inject malicious scripts that execute in the context of users' browsers. 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 low impact on confidentiality, integrity, and availability.

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 malicious actions affecting confidentiality, integrity, and availability of user data. The vulnerability does not require authentication, increasing its risk. However, no known exploits are reported in the wild at this time.

No official patch or remediation guidance is currently available from the vendor. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is released, users should consider applying web application firewall (WAF) rules to detect and block XSS attempts and avoid exposing the vulnerable application to untrusted users where possible.