CVE-2025-66529 identifies a Cross-Site Request Forgery (CSRF) vulnerability in the Ays Pro Chartify chart-builder software, affecting all versions up to and including 3.6.3. CSRF vulnerabilities allow attackers to induce authenticated users to perform unintended actions on a web application by exploiting the user's active session. In this case, the vulnerability exists because Chartify does not adequately verify the origin of state-changing requests, enabling attackers to craft malicious web pages or links that, when visited by an authenticated user, execute unauthorized commands such as modifying charts, changing configurations, or potentially injecting malicious data. The CVSS 3.1 vector (AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H) indicates that the attack can be performed remotely over the network with low attack complexity, requires no privileges, but does require user interaction (e.g., clicking a link). Successful exploitation impacts confidentiality, integrity, and availability severely, potentially allowing attackers to manipulate sensitive data visualizations or disrupt service. No patches or exploit code are currently publicly available, but the vulnerability is published and should be treated as urgent. The lack of embedded anti-CSRF protections such as tokens or strict origin checks is the root cause. This vulnerability is particularly critical for organizations relying on Chartify for business intelligence, reporting, or decision-making processes.

For European organizations, the impact of this CSRF vulnerability can be significant. Unauthorized manipulation of chart data or configurations could lead to incorrect business decisions, financial loss, or reputational damage. Confidential data visualizations could be exposed or altered, violating GDPR and other data protection regulations, potentially resulting in legal penalties. Availability impacts could disrupt analytics workflows, affecting operational continuity. Sectors such as finance, healthcare, government, and critical infrastructure that rely heavily on accurate data representation are especially vulnerable. The ease of exploitation combined with the high impact on confidentiality, integrity, and availability makes this a critical risk. Additionally, the requirement for user interaction means phishing or social engineering campaigns could be used to facilitate exploitation, increasing the threat surface. The absence of known exploits currently provides a window for proactive mitigation before active attacks emerge.

European organizations should immediately audit their use of Ays Pro Chartify and identify affected versions (<= 3.6.3). Although no official patches are currently listed, organizations should monitor vendor communications for updates and apply patches promptly once available. In the interim, implement web application firewall (WAF) rules to detect and block suspicious cross-site requests targeting Chartify endpoints. Enforce strict referer and origin header validation on the server side to reject unauthorized requests. Incorporate anti-CSRF tokens in all state-changing requests within Chartify or through custom proxy layers if possible. Educate users about the risks of clicking untrusted links and implement phishing awareness training to reduce user interaction risks. Consider isolating Chartify instances behind VPNs or restricting access to trusted networks to reduce exposure. Regularly review logs for unusual activity indicative of CSRF exploitation attempts. Finally, integrate Chartify usage into broader vulnerability management and incident response plans to ensure rapid detection and remediation.