CVE-2025-70845 identifies a Cross Site Scripting (XSS) vulnerability in the lty628 aidigu version 1.9.1, specifically located on the /setting/ page where the 'intro' input field fails to properly sanitize or escape user-supplied input. This vulnerability allows an attacker to inject malicious JavaScript code that executes in the context of the victim's browser session when the vulnerable page is accessed. The lack of input validation and output encoding means that any script inserted into the 'intro' field can run with the same privileges as the legitimate web application, potentially leading to session hijacking, theft of cookies or credentials, defacement, or redirection to malicious sites. The vulnerability does not require prior authentication, making it accessible to unauthenticated attackers, and does not require user interaction beyond visiting the affected page, increasing its exploitability. No known exploits have been reported in the wild as of the publication date, and no official patches or fixes have been linked yet. The absence of a CVSS score necessitates an assessment based on the vulnerability's characteristics, which indicate a high severity due to the direct impact on confidentiality and integrity of user data and sessions. The vulnerability highlights the importance of secure coding practices, especially input validation and output encoding, to prevent injection attacks in web applications.

For European organizations, this XSS vulnerability poses significant risks to web application security, particularly for those using lty628 aidigu or similar software. Exploitation could lead to unauthorized access to user sessions, theft of sensitive information such as credentials or personal data, and potential compromise of internal systems if administrative users are targeted. The vulnerability could facilitate phishing attacks by injecting malicious content into trusted web pages, undermining user trust and potentially leading to regulatory non-compliance under GDPR due to data breaches. The ease of exploitation without authentication increases the threat level, especially for organizations with public-facing web portals. Additionally, the lack of known exploits currently provides a window for proactive mitigation before widespread attacks occur. The impact extends to reputational damage and financial losses from incident response and remediation efforts. Organizations in sectors with high regulatory scrutiny, such as finance, healthcare, and government, are particularly vulnerable to the consequences of such an attack.

To mitigate CVE-2025-70845, organizations should first verify if they are using lty628 aidigu v1.9.1 or similar vulnerable versions and prioritize upgrading to a patched version once available. In the absence of an official patch, immediate steps include implementing strict input validation on the 'intro' field to reject or sanitize any potentially malicious input. Employing output encoding techniques such as HTML entity encoding before rendering user input on the /setting/ page is critical to prevent script execution. Deploying a robust Content Security Policy (CSP) can help restrict the execution of unauthorized scripts and reduce the impact of any injected code. Web application firewalls (WAFs) should be configured to detect and block common XSS payloads targeting this endpoint. Regular security audits and penetration testing focused on input handling can identify similar vulnerabilities proactively. Additionally, educating developers on secure coding practices and integrating security into the software development lifecycle will help prevent recurrence. Monitoring web server and application logs for unusual activity related to the /setting/ page can provide early detection of exploitation attempts.