CVE-2025-47616 is a Stored Cross-Site Scripting (XSS) vulnerability classified under CWE-79, affecting the aBlocks product developed by Tushar Imran. This vulnerability arises due to improper neutralization of input during web page generation, allowing malicious scripts to be stored and subsequently executed in the context of users viewing the affected web pages. The affected versions include all versions up to 1.9.2, with no specific earliest version identified. The vulnerability has a CVSS 3.1 base score of 6.5, indicating a medium severity level. The vector string (CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L) reveals that the attack can be executed remotely over the network with low attack complexity, requires privileges (PR:L) and user interaction (UI:R), and impacts confidentiality, integrity, and availability to a limited extent. The scope is changed (S:C), meaning the vulnerability affects components beyond the initially vulnerable component. Stored XSS vulnerabilities are particularly dangerous because malicious payloads are saved on the server and delivered to multiple users, potentially leading to session hijacking, credential theft, defacement, or distribution of malware. Although no known exploits are currently reported in the wild, the presence of this vulnerability in aBlocks, a web application framework or tool, poses a risk to any organization using it to build or manage web content. The lack of available patches at the time of publication further increases the urgency for mitigation.

For European organizations using aBlocks in their web infrastructure, this vulnerability could lead to unauthorized access to user sessions, theft of sensitive information, and potential defacement or disruption of web services. Given the medium severity, the impact on confidentiality, integrity, and availability is limited but non-negligible. Attackers exploiting this vulnerability could target employees or customers through crafted inputs that get stored and executed in browsers, potentially leading to phishing, credential compromise, or lateral movement within the network. Organizations in sectors with high regulatory requirements, such as finance, healthcare, and government, may face compliance risks if such vulnerabilities are exploited. Additionally, the cross-site scripting nature of the vulnerability could be leveraged to bypass security controls or deliver secondary payloads, increasing the threat surface. The requirement for user interaction and privileges reduces the ease of exploitation but does not eliminate the risk, especially in environments where users have elevated privileges or where social engineering is effective.

1. Immediate review and sanitization of all user inputs in aBlocks-based applications should be conducted to ensure proper encoding and neutralization of potentially malicious scripts. 2. Implement Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts in browsers. 3. Limit user privileges to the minimum necessary to reduce the risk posed by PR:L in the CVSS vector. 4. Educate users about the risks of interacting with untrusted content and encourage cautious behavior to mitigate UI:R requirements. 5. Monitor web application logs for unusual input patterns or script injections indicative of attempted exploitation. 6. If possible, isolate or sandbox components of aBlocks to contain potential impacts. 7. Stay updated with vendor advisories for patches or updates addressing this vulnerability and apply them promptly once available. 8. Conduct regular security assessments and penetration testing focusing on XSS and input validation weaknesses within aBlocks deployments.