CVE-2025-24566 identifies a reflected Cross-site Scripting (XSS) vulnerability in the Intro Tour Tutorial DeepPresentation software developed by Tomáš Groulík. This vulnerability stems from improper neutralization of user-supplied input during the generation of web pages, allowing malicious scripts to be injected and reflected back to users. The affected product versions include all releases up to and including 6.5.2. Reflected XSS vulnerabilities occur when input from a user is included in the output page without proper sanitization or encoding, enabling attackers to craft malicious URLs or requests that execute arbitrary JavaScript in the victim’s browser. This can lead to theft of session cookies, credentials, or execution of unauthorized actions within the context of the victim’s session. The vulnerability does not require authentication, making it easier for attackers to exploit by enticing victims to click on malicious links. Although no public exploits have been reported yet, the flaw is publicly disclosed and thus may attract attackers. The lack of a CVSS score means severity must be inferred from the nature of the vulnerability: reflected XSS is generally considered high risk due to its potential to compromise user data and trust. The vulnerability affects web applications that rely on the DeepPresentation Intro Tour Tutorial, which is used for interactive web tutorials and presentations, potentially exposing users of these applications to attack. The vulnerability was reserved in January 2025 and published in February 2025, indicating recent discovery and disclosure.

The primary impact of this vulnerability is on the confidentiality and integrity of user data. Successful exploitation allows attackers to execute arbitrary scripts in the context of the victim’s browser, potentially leading to session hijacking, theft of sensitive information such as cookies or credentials, and unauthorized actions performed on behalf of the user. This can result in account compromise, data leakage, and erosion of user trust. For organizations, this can lead to reputational damage, regulatory penalties if personal data is exposed, and operational disruption if attackers leverage the vulnerability to escalate attacks. Since the vulnerability is reflected XSS, it requires user interaction, which somewhat limits the scope but does not eliminate risk, especially in phishing or social engineering scenarios. The affected product is used in web tutorial and presentation contexts, which may be integrated into broader enterprise or educational platforms, increasing the potential attack surface. Without timely mitigation, attackers could exploit this vulnerability to target users of affected applications globally.

To mitigate this vulnerability, organizations should first apply any available patches or updates from the vendor once released. In the absence of patches, implement strict input validation and output encoding on all user-supplied data included in web pages, especially in URL parameters and reflected content. Employ Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts and reduce the impact of XSS attacks. Use security-focused HTTP headers such as X-XSS-Protection and HttpOnly cookies to protect session data. Educate users about the risks of clicking on suspicious links and implement phishing detection mechanisms. Conduct thorough code reviews and security testing for web applications using the affected product to identify and remediate similar issues. Monitor web traffic for unusual patterns that may indicate exploitation attempts. Finally, consider deploying web application firewalls (WAFs) with rules designed to detect and block reflected XSS payloads targeting this product.