CVE-2025-11765 is a stored Cross-Site Scripting (XSS) vulnerability identified in the developdaly Stock Tools plugin for WordPress, affecting all versions up to and including 1.1. The vulnerability arises from improper neutralization of input during web page generation (CWE-79), specifically in the handling of the 'image_height' and 'image_width' shortcode attributes. These attributes lack sufficient input sanitization and output escaping, allowing authenticated users with contributor-level permissions or higher to inject arbitrary JavaScript code into pages. Because the injected scripts are stored persistently, they execute whenever any user accesses the compromised page, potentially enabling session hijacking, privilege escalation, or redirection to malicious sites. The vulnerability has a CVSS v3.1 base score of 6.4, reflecting medium severity, with an attack vector of network (remote), low attack complexity, requiring privileges (PR:L), no user interaction, and scope change (S:C). The impact affects confidentiality and integrity but not availability. No patches or fixes have been released at the time of publication, and no known exploits are reported in the wild. The vulnerability was reserved on 2025-10-14 and published on 2025-11-21. The plugin is used in WordPress environments, which are widely deployed across Europe, especially in small and medium enterprises and content-driven websites. The exploit requires authenticated access, which limits exposure but still poses a significant risk if contributor accounts are compromised or misused.

For European organizations, this vulnerability poses a moderate risk primarily to the confidentiality and integrity of web applications using the developdaly Stock Tools plugin. Attackers with contributor-level access can inject malicious scripts that execute in the context of other users, potentially leading to session hijacking, theft of sensitive information, or unauthorized actions performed on behalf of legitimate users. This can damage organizational reputation, lead to data breaches, and facilitate further attacks such as phishing or malware distribution. Since WordPress powers a significant portion of websites in Europe, including government, educational, and commercial sectors, the vulnerability could affect a broad range of targets. The requirement for authenticated access reduces the attack surface but does not eliminate risk, especially in environments with weak access controls or compromised contributor accounts. The lack of availability impact means service disruption is unlikely, but the integrity and confidentiality risks remain significant. The absence of known exploits in the wild provides a window for mitigation before active exploitation occurs.

European organizations should take immediate steps to mitigate this vulnerability beyond generic advice: 1) Audit and restrict contributor-level access to trusted users only, enforcing strong authentication and regular access reviews. 2) Implement Web Application Firewall (WAF) rules to detect and block suspicious shortcode attribute inputs, especially those containing script tags or suspicious characters. 3) Monitor WordPress logs for unusual shortcode usage or unexpected changes in pages using the Stock Tools plugin. 4) Employ Content Security Policy (CSP) headers to limit the execution of unauthorized scripts in affected web applications. 5) Until an official patch is released, consider disabling or removing the developdaly Stock Tools plugin if it is not essential. 6) Educate content contributors about the risks of injecting untrusted content and enforce input validation policies. 7) Prepare to apply vendor patches promptly once available and test updates in staging environments before production deployment. 8) Conduct regular vulnerability scans and penetration tests focusing on WordPress plugins to identify similar issues proactively.