CVE-2024-30461 is a vulnerability classified under CWE-79, indicating improper neutralization of input during web page generation, specifically leading to DOM-based Cross-site Scripting (XSS) in Tumult Inc's Tumult Hype Animations software. This product is used to create interactive HTML5 animations and web content. The vulnerability affects all versions up to 1.9.11. The core issue is that user-supplied input is not properly sanitized or encoded before being incorporated into the DOM, allowing an attacker to inject malicious JavaScript code. When a victim loads a page containing the vulnerable animation, the injected script executes in their browser context, potentially leading to theft of sensitive information such as cookies or session tokens, manipulation of the webpage content, or redirection to malicious sites. The CVSS 3.1 vector (AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L) indicates that the attack can be launched remotely over the network with low attack complexity, requires no privileges but does require user interaction, and affects confidentiality, integrity, and availability with a scope change. No patches or fixes are currently linked, and no active exploits have been reported in the wild. The vulnerability is particularly dangerous because it can be embedded in widely distributed web content, increasing the attack surface. The issue highlights the importance of secure coding practices in web animation tools that dynamically generate HTML and JavaScript content.

For European organizations, the impact of this DOM-based XSS vulnerability can be significant, especially for those relying on Tumult Hype Animations to deliver interactive web content, marketing materials, or customer engagement platforms. Successful exploitation can lead to unauthorized access to user sessions, data leakage, and potential defacement or manipulation of web content, undermining user trust and brand reputation. Confidential information such as authentication tokens or personal data could be compromised, leading to compliance issues under GDPR. Additionally, attackers could use the vulnerability as a foothold for further attacks within the network or to distribute malware. The availability of affected web services could also be disrupted, impacting business operations. Given the cross-site nature of the attack, any user visiting compromised pages is at risk, amplifying the potential scale of impact across European user bases.

Immediate mitigation steps include implementing strict input validation and output encoding within any custom scripts or web content that utilize Tumult Hype Animations. Organizations should monitor for updates or patches from Tumult Inc and apply them promptly once available. Employing Content Security Policy (CSP) headers can significantly reduce the risk by restricting the execution of unauthorized scripts. Web application firewalls (WAFs) can be configured to detect and block suspicious payloads targeting XSS vulnerabilities. Developers should review animation projects to identify and sanitize any dynamic content sources. Additionally, educating users about the risks of interacting with untrusted web content can reduce the likelihood of successful exploitation. Regular security assessments and penetration testing focusing on client-side vulnerabilities should be conducted to identify and remediate similar issues proactively.