CVE-2025-50270 is a stored Cross-Site Scripting (XSS) vulnerability identified in the content management feature of AnQiCMS version 3.4.11. This vulnerability allows a remote attacker to inject malicious scripts into the parameters 'title', 'categoryTitle', and 'tmpTag'. Because it is a stored XSS, the malicious payload is saved on the server and subsequently executed in the browsers of users who access the affected content. Exploiting this vulnerability, an attacker can execute arbitrary JavaScript code within the context of the victim's browser session. This can lead to session hijacking, defacement, redirection to malicious sites, or the theft of sensitive information such as cookies or credentials. The vulnerability does not require authentication, meaning any remote attacker can exploit it by submitting crafted input to the vulnerable parameters. Although no CVSS score is assigned yet and no known exploits are reported in the wild, the nature of stored XSS vulnerabilities typically presents a significant risk, especially in CMS platforms that manage dynamic content and have multiple users accessing the system. The lack of patch links suggests that a fix may not yet be publicly available, increasing the urgency for organizations using AnQiCMS 3.4.11 to implement mitigations or consider upgrading once a patch is released.

For European organizations using AnQiCMS 3.4.11, this vulnerability poses a considerable risk to the confidentiality and integrity of their web applications and user data. Stored XSS can lead to unauthorized access to user sessions, enabling attackers to impersonate legitimate users, including administrators, which could result in unauthorized changes to website content or access to sensitive backend systems. This can damage organizational reputation, lead to data breaches involving personal data protected under GDPR, and cause operational disruptions. Given the CMS nature, websites affected may include corporate portals, e-commerce platforms, or public-facing informational sites, amplifying the potential impact. Additionally, exploitation could facilitate further attacks such as phishing campaigns targeting European users or lateral movement within internal networks if administrative credentials are compromised. The absence of known exploits currently limits immediate risk, but the vulnerability's public disclosure increases the likelihood of future exploitation attempts.

European organizations should immediately audit their use of AnQiCMS to identify any instances of version 3.4.11. Until an official patch is available, organizations should implement strict input validation and output encoding on the 'title', 'categoryTitle', and 'tmpTag' parameters to neutralize malicious scripts. Employing Content Security Policy (CSP) headers can help restrict the execution of unauthorized scripts in browsers. Web Application Firewalls (WAFs) should be configured to detect and block typical XSS payload patterns targeting these parameters. Additionally, organizations should conduct thorough code reviews and penetration testing focused on XSS vectors within their CMS deployments. User awareness training should be enhanced to recognize phishing attempts that may leverage this vulnerability. Finally, monitoring web server logs and user activity for unusual behavior can provide early detection of exploitation attempts. Planning for an upgrade to a patched version of AnQiCMS once available is critical to fully remediate the vulnerability.