CVE-2025-53336 is a stored Cross-site Scripting (XSS) vulnerability classified under CWE-79, affecting the 'My Resume Builder' application developed by abditsori, specifically versions up to 1.0.3. Stored XSS occurs when malicious input is improperly neutralized and then persistently stored by the application, later being served to users without adequate sanitization or encoding. This vulnerability allows an attacker with at least limited privileges (PR:L) and requiring user interaction (UI:R) to inject malicious scripts into the web pages generated by the application. When other users or administrators view the affected pages, the malicious scripts execute in their browsers, potentially leading to session hijacking, credential theft, unauthorized actions, or malware delivery. The CVSS v3.1 base score of 6.5 indicates a medium severity, with an attack vector of network (AV:N), low attack complexity (AC:L), partial privileges required (PR:L), and user interaction needed (UI:R). The scope is changed (S:C), meaning the vulnerability affects resources beyond the vulnerable component, impacting confidentiality, integrity, and availability at a low level. No known exploits are currently reported in the wild, and no official patches have been linked yet. The vulnerability stems from improper input neutralization during web page generation, highlighting insufficient input validation and output encoding in the application’s codebase.

For European organizations using 'My Resume Builder'—likely small to medium enterprises or HR departments relying on this tool for resume management—the stored XSS vulnerability poses a significant risk. Exploitation could lead to unauthorized access to sensitive personal data contained in resumes, manipulation of stored information, or the spread of malicious payloads to users and administrators. This can result in data breaches violating GDPR requirements, reputational damage, and potential legal consequences. The medium severity score reflects that while exploitation requires some privileges and user interaction, the impact on confidentiality, integrity, and availability is tangible. Given the nature of the application, which handles personal and professional data, the confidentiality impact is particularly critical. Additionally, the scope change indicates that exploitation could affect multiple users or system components beyond the initial vulnerability point, increasing the risk of lateral movement or broader compromise within organizational environments.

To mitigate this vulnerability effectively, organizations should: 1) Immediately audit and sanitize all user inputs in the 'My Resume Builder' application, implementing robust input validation and output encoding consistent with OWASP XSS prevention guidelines. 2) Apply any forthcoming patches or updates from abditsori promptly once available. 3) Employ Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts in browsers accessing the application. 4) Conduct regular security testing, including automated scanning and manual code reviews, focusing on input handling and output rendering. 5) Limit user privileges strictly to the minimum necessary to reduce the risk of exploitation by low-privilege users. 6) Educate users and administrators about the risks of clicking on suspicious links or interacting with untrusted content within the application. 7) Consider isolating the application environment or deploying web application firewalls (WAFs) with rules designed to detect and block XSS payloads targeting this product. These measures go beyond generic advice by focusing on both immediate remediation and long-term security hygiene tailored to the specific vulnerability and application context.