CVE-2024-0254 is a stored cross-site scripting vulnerability in the (Simply) Guest Author Name WordPress plugin by nomadcoder. The flaw arises from insufficient sanitization and escaping of user input in post meta fields, allowing authenticated contributors or higher to inject arbitrary JavaScript code. This code executes in the context of any user viewing the compromised page, potentially leading to session hijacking or other script-based attacks. The vulnerability affects all versions up to and including 4.34. The CVSS 3.1 base score is 6.4 (AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N), reflecting network attack vector, low attack complexity, required privileges, no user interaction, scope change, and limited confidentiality and integrity impact without availability impact.

An authenticated attacker with contributor-level or higher permissions can inject persistent malicious scripts into pages via post meta fields. These scripts execute in the browsers of users who view the infected pages, potentially compromising user sessions or performing unauthorized actions within the context of the affected site. The vulnerability does not impact availability but affects confidentiality and integrity to a limited extent. There are no reports of active exploitation in the wild.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict contributor-level permissions to trusted users only and consider disabling or removing the (Simply) Guest Author Name plugin if feasible. Monitor for plugin updates from nomadcoder addressing this vulnerability.