CVE-2025-62937 identifies a stored Cross-Site Scripting (XSS) vulnerability in the Johnny Post List Featured Image plugin, versions up to and including 0.5.9. The vulnerability stems from improper neutralization of user-supplied input during the generation of web pages, specifically within the post-list-featured-image component. Stored XSS means that malicious scripts injected by an attacker are permanently stored on the target system and executed in the context of users who view the affected pages. The CVSS 3.1 vector (AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N) indicates that the attack can be performed remotely over the network with low attack complexity, requires limited privileges (authenticated user), and user interaction (such as clicking a crafted link) is necessary. The scope is changed, meaning the vulnerability affects components beyond the initially vulnerable module. The impact includes limited confidentiality and integrity loss, such as theft of session cookies or manipulation of displayed content, but does not affect system availability. No patches or exploits are currently documented, but the vulnerability is publicly disclosed and should be addressed promptly. The plugin is typically used in WordPress environments to display featured images in post lists, making it relevant for websites relying on this functionality.

For European organizations, this vulnerability poses a risk primarily to web applications using the Johnny Post List Featured Image plugin. Exploitation could allow attackers to execute arbitrary JavaScript in the context of authenticated users, potentially leading to session hijacking, unauthorized actions, or data leakage. This can undermine user trust and lead to reputational damage, especially for organizations handling sensitive or personal data under GDPR regulations. While availability is not impacted, the integrity and confidentiality concerns could result in compliance issues and financial penalties. Organizations with public-facing websites or intranet portals using this plugin are at higher risk. The absence of known exploits in the wild reduces immediate threat but does not eliminate the risk of future attacks, especially as the vulnerability is publicly known.

1. Monitor for official patches or updates from the Johnny plugin developers and apply them immediately upon release. 2. Until patches are available, restrict plugin usage to trusted users with minimal privileges to reduce exploitation risk. 3. Implement robust input validation and output encoding on all user-supplied data within the plugin context to prevent script injection. 4. Employ Content Security Policy (CSP) headers to limit the execution of unauthorized scripts on affected web pages. 5. Conduct regular security audits and penetration testing focusing on web application components, including plugins. 6. Educate users about the risks of clicking on suspicious links or interacting with untrusted content. 7. Consider disabling or replacing the plugin if it is not essential or if no timely patch is forthcoming.