CVE-2026-24564 identifies a Cross-Site Scripting (XSS) vulnerability in the Israpil Textmetrics web application, specifically versions up to and including 3.6.3. The vulnerability stems from improper neutralization of script-related HTML tags within the web interface, allowing an attacker to inject malicious scripts into web pages served to users. This form of XSS is categorized as a basic reflected or stored XSS, depending on the injection vector, which can lead to code execution in the context of the victim's browser. The CVSS 3.1 base score is 4.3 (medium), with the vector indicating network attack vector (AV:N), low attack complexity (AC:L), but requiring high privileges (PR:H) and user interaction (UI:R). The scope remains unchanged (S:U), and the impacts on confidentiality, integrity, and availability are all low (C:L/I:L/A:L). No public exploits or active exploitation have been reported to date. The vulnerability affects the Textmetrics product, a tool used for content optimization and SEO, which is typically accessed via web browsers. The flaw could be exploited by an authenticated user with elevated privileges who convinces another user to interact with a crafted link or input, leading to script execution in the victim's browser session. This could result in session hijacking, phishing, or manipulation of displayed content. The lack of vendor patch links suggests that remediation may still be pending or in development. The vulnerability was published on January 23, 2026, and assigned by Patchstack. Given the nature of the vulnerability, it is critical for organizations using Textmetrics to monitor for updates and implement defensive controls to mitigate the risk.

For European organizations, the impact of CVE-2026-24564 is primarily related to potential compromise of user sessions, unauthorized actions performed on behalf of users, and possible exposure of sensitive information through script injection. Since the vulnerability requires high privileges and user interaction, the risk is somewhat contained but still significant in environments where multiple users access Textmetrics with elevated rights. Organizations relying on Textmetrics for content creation, SEO, or digital marketing could face reputational damage if attackers leverage this vulnerability to inject malicious content or redirect users to phishing sites. Additionally, the integrity of marketing data and content could be compromised, affecting business operations. The availability impact is low but could include disruption if malicious scripts cause application errors or browser crashes. Given the interconnected nature of European digital ecosystems and the importance of compliance with data protection regulations like GDPR, exploitation could also lead to regulatory scrutiny and potential fines if personal data is exposed or manipulated.

To mitigate CVE-2026-24564, organizations should first monitor Israpil's official channels for security patches and apply them promptly once released. In the interim, implement strict input validation and output encoding on all user-supplied data within the Textmetrics environment to prevent script injection. Employ Content Security Policies (CSP) to restrict the execution of unauthorized scripts in browsers accessing the application. Limit the number of users with high privileges and enforce the principle of least privilege to reduce the attack surface. Conduct user awareness training to recognize and avoid interacting with suspicious links or inputs that could trigger the vulnerability. Additionally, consider deploying Web Application Firewalls (WAFs) with rules designed to detect and block XSS payloads targeting Textmetrics. Regularly audit and monitor application logs for unusual activities indicative of attempted exploitation. Finally, integrate security testing into the development and deployment lifecycle to identify and remediate similar issues proactively.