CVE-2025-14887 is a stored cross-site scripting vulnerability (CWE-79) in the twinklesmtp – Email Service Provider For WordPress plugin. It occurs due to improper neutralization of input in the plugin's sender settings, allowing authenticated administrators to inject arbitrary web scripts. These scripts execute in the context of users visiting the injected pages. The vulnerability affects all plugin versions up to 1.03 and is limited to multi-site WordPress setups or installations with unfiltered_html disabled. The CVSS 3.1 base score is 4.4, reflecting a medium severity with network attack vector, high attack complexity, and requiring high privileges but no user interaction.

An attacker with administrator-level permissions can inject malicious scripts into the plugin's sender settings, which are then stored and executed in the context of other users accessing the affected pages. This can lead to limited confidentiality and integrity impacts, such as session hijacking or unauthorized actions performed on behalf of users. The vulnerability does not affect availability and requires high privileges and a multi-site or restricted HTML environment to be exploitable.

No official patch or fix is currently documented for this vulnerability. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict administrator access to trusted users only and consider disabling or removing the twinklesmtp plugin in multi-site or restricted HTML environments. Monitor vendor channels for updates and apply any official patches promptly once released.