CVE-2025-46517 is a Stored Cross-Site Scripting (XSS) vulnerability identified in the Blog Manager WP plugin developed by wpdiscover. This vulnerability arises from improper neutralization of user-supplied input during web page generation, classified under CWE-79. Specifically, the plugin fails to adequately sanitize or encode input fields that are subsequently rendered in web pages, allowing an attacker to inject malicious scripts that are stored persistently within the application’s data store. When a legitimate user or administrator views the affected page, the malicious script executes in their browser context. This can lead to session hijacking, credential theft, defacement, or redirection to malicious sites. The vulnerability affects all versions of Blog Manager WP up to and including version 1.0.5. No official patches or updates have been released at the time of this analysis, and no known exploits have been observed in the wild. The vulnerability was publicly disclosed on April 24, 2025, and has been enriched by CISA, indicating recognition by US cybersecurity authorities. The lack of a CVSS score limits precise quantification of risk, but the nature of stored XSS typically poses a medium risk due to its potential for persistent impact and exploitation ease, especially in environments where user privileges vary and sensitive operations are performed via the plugin interface.

For European organizations, the impact of this vulnerability can be significant, particularly for those relying on WordPress-based content management systems with the Blog Manager WP plugin installed. Stored XSS can compromise the confidentiality and integrity of user sessions, potentially allowing attackers to impersonate users, including administrators, leading to unauthorized access to sensitive data or control over website content. This can damage organizational reputation, lead to data breaches involving personal data protected under GDPR, and disrupt business operations. Additionally, if exploited on websites serving critical services or e-commerce platforms, it could facilitate further attacks such as phishing or malware distribution. The persistent nature of stored XSS increases the risk of widespread impact across multiple users. Given the plugin’s role in blog management, editorial workflows and content integrity are at risk, which can affect communication and information dissemination within organizations.

1. Immediate mitigation should involve disabling or uninstalling the Blog Manager WP plugin until a security patch is released. 2. Implement strict input validation and output encoding at the application level, especially for any user-generated content fields managed by the plugin. 3. Employ Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts in browsers. 4. Conduct thorough security audits of all WordPress plugins in use, prioritizing those that handle user input and content generation. 5. Monitor web application logs for unusual input patterns or script injection attempts. 6. Educate site administrators and content editors on recognizing signs of XSS exploitation. 7. Once a patch is available, apply it promptly and verify the remediation through penetration testing focused on XSS vectors. 8. Consider deploying Web Application Firewalls (WAFs) with rules targeting XSS payloads as an additional protective layer.