CVE-2025-62743 identifies a stored Cross-site Scripting (XSS) vulnerability in the zookatron MyBookTable Bookstore plugin, versions up to 3.5.5. This vulnerability is classified under CWE-79, indicating improper neutralization of input during web page generation. Specifically, the plugin fails to adequately sanitize or encode user-supplied input before embedding it into web pages, allowing attackers to inject malicious JavaScript payloads that persist in the application. The vulnerability requires low privileges (PR:L), meaning an attacker must have some authenticated access, and user interaction (UI:R), such as a victim visiting a crafted page, to trigger the exploit. The CVSS v3.1 base score is 6.5 (medium severity), with vector AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L, indicating network attack vector, low attack complexity, partial confidentiality, integrity, and availability impacts, and scope change. Exploiting this vulnerability could allow attackers to execute arbitrary scripts in the context of other users, potentially stealing session tokens, defacing content, or performing actions on behalf of victims. Although no known exploits are reported in the wild and no patches are currently available, the vulnerability poses a tangible risk to websites using this plugin, especially those handling sensitive user data or financial transactions. The vulnerability was reserved in October 2025 and published at the end of 2025, suggesting it is a recent discovery requiring attention.

For European organizations, the impact of this stored XSS vulnerability can be significant, especially for those operating e-commerce platforms or content management systems using the MyBookTable Bookstore plugin. Attackers exploiting this flaw could hijack user sessions, steal sensitive customer information, or manipulate displayed content, undermining user trust and potentially violating GDPR requirements for data protection. The partial compromise of confidentiality, integrity, and availability could lead to reputational damage, financial losses, and regulatory penalties. Additionally, the scope change in the CVSS vector indicates that the vulnerability could affect components beyond the immediate plugin, potentially impacting integrated systems. Given the widespread use of WordPress and its plugins in Europe, organizations with limited security monitoring or delayed patch management are at higher risk. The absence of known exploits currently provides a window for proactive mitigation, but the potential for future exploitation remains high.

European organizations should implement the following specific mitigation steps: 1) Immediately audit all instances of the MyBookTable Bookstore plugin to identify affected versions (up to 3.5.5) and plan for upgrade or patch deployment once available. 2) Employ web application firewalls (WAFs) with custom rules to detect and block typical XSS payloads targeting this plugin. 3) Enforce strict input validation and output encoding on all user-supplied data fields related to the plugin, potentially via custom code or security plugins that sanitize inputs. 4) Limit user privileges to the minimum necessary to reduce the risk of low-privilege attackers injecting malicious content. 5) Monitor web server and application logs for unusual or suspicious activity indicative of attempted XSS exploitation. 6) Educate users and administrators about the risks of clicking on untrusted links or interacting with unverified content. 7) Prepare incident response plans to quickly address any detected exploitation. 8) Engage with the vendor or community to track patch releases and apply updates promptly. These measures go beyond generic advice by focusing on plugin-specific controls, proactive detection, and user privilege management.