CVE-2026-1444 identifies a cross-site scripting (XSS) vulnerability in the iJason-Liu Books_Manager application, specifically within the add_book_check.php file. The vulnerability stems from improper handling of the 'mark' parameter, which is susceptible to malicious script injection. This flaw allows remote attackers to craft requests that inject arbitrary JavaScript code, which executes in the context of the victim's browser when they interact with the affected functionality. The vulnerability does not require authentication but does require high privileges (PR:H) and user interaction (UI:P), indicating that an attacker must have elevated access and trick a user into triggering the payload. The CVSS 4.0 vector indicates network attack vector (AV:N), low attack complexity (AC:L), no privileges required (PR:H is contradictory but likely means high privileges are needed), and partial impact on integrity (VI:L) but no impact on confidentiality or availability. The product does not use versioning, complicating identification of affected releases beyond the known commit hash. No patches or fixes are currently available, and no known exploits have been observed in the wild, though public disclosure increases risk. The vulnerability could be leveraged for session hijacking, phishing, or defacement attacks, undermining user trust and data integrity within affected deployments.

For European organizations, the impact of CVE-2026-1444 depends on the deployment scale of the iJason-Liu Books_Manager application, commonly used in educational, publishing, or library management contexts. Exploitation could lead to unauthorized script execution in users' browsers, resulting in session hijacking, credential theft, or manipulation of displayed content. This compromises confidentiality and integrity of user data and may facilitate further attacks such as phishing or malware distribution. While availability is not directly impacted, reputational damage and loss of user trust could have significant operational consequences. Organizations with high-value intellectual property or sensitive user data are at greater risk. The requirement for high privileges and user interaction limits the attack surface but does not eliminate risk, especially in environments with multiple user roles and web access. Given the public disclosure, attackers may develop exploits targeting European institutions, particularly those with less mature security controls or delayed patching processes.

To mitigate CVE-2026-1444, European organizations should implement strict input validation and output encoding on the 'mark' parameter within the add_book_check.php controller to prevent injection of malicious scripts. Employ Content Security Policy (CSP) headers to restrict execution of unauthorized scripts in browsers. Limit access to the vulnerable functionality to trusted users and roles, minimizing exposure. Conduct thorough code reviews and penetration testing focusing on XSS vectors in the Books_Manager application. If possible, isolate the application within segmented network zones to reduce lateral movement risks. Monitor web application logs for suspicious input patterns targeting the 'mark' parameter. Educate users about phishing and social engineering risks associated with XSS attacks. Engage with the vendor or community to obtain patches or updates, and consider deploying Web Application Firewalls (WAFs) with rules targeting known XSS payloads. Finally, maintain an incident response plan to quickly address any exploitation attempts.