CVE-2025-0957 is a stored cross-site scripting vulnerability (CWE-79) in the YaySMTP plugin for WordPress, specifically versions up to 1.7.1. The vulnerability arises from insufficient neutralization of input during web page generation, allowing unauthenticated attackers to inject arbitrary scripts that execute in the context of users visiting the injected pages. The CVSS 3.1 base score is 7.2, reflecting a network attack vector, low attack complexity, no privileges required, no user interaction, and a scope change with limited confidentiality and integrity impact but no availability impact. There is no vendor advisory or patch information available at this time.

Successful exploitation allows an unauthenticated attacker to execute arbitrary JavaScript in the context of users visiting affected pages, potentially leading to session hijacking, defacement, or other malicious actions impacting confidentiality and integrity. The vulnerability does not affect availability. There are no known exploits in the wild reported.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, users should consider disabling or removing the affected plugin version or applying manual mitigations such as input validation and output escaping if feasible. Monitor vendor channels for updates and apply patches promptly once released.