The vulnerability CVE-2025-63020 in Wayne Allen Postie is a stored cross-site scripting (XSS) issue caused by improper input neutralization during web page generation. This allows attackers with limited privileges and requiring user interaction to execute scripts in the context of affected users. The vulnerability affects Postie versions up to 1.9.73. The CVSS 3.1 base score is 6.5, reflecting network attack vector, low attack complexity, requiring privileges and user interaction, with impacts on confidentiality, integrity, and availability rated as low to low-medium. No patch or official remediation information is currently available.

Successful exploitation could allow an attacker to execute arbitrary scripts in the context of users viewing the affected web pages, potentially leading to information disclosure, session hijacking, or other impacts on confidentiality, integrity, and availability. The attack requires the attacker to have some privileges and for the victim to interact with the malicious content. There are no known active 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 input handling and consider applying any recommended temporary mitigations from the vendor once published. Monitoring vendor channels for updates is advised.