CVE-2025-66529 identifies a Cross-Site Request Forgery (CSRF) vulnerability in the Ays Pro Chartify chart-builder product, affecting all versions up to and including 3.6.3. CSRF vulnerabilities occur when a web application does not properly verify that requests modifying state originate from legitimate users, enabling attackers to craft malicious web pages or links that cause authenticated users to unknowingly perform actions such as changing settings, submitting forms, or altering data. In this case, Chartify lacks sufficient anti-CSRF protections, such as synchronizer tokens or origin checks, allowing attackers to exploit this flaw. The vulnerability requires the victim to be authenticated to the Chartify application, but no additional user interaction beyond visiting a malicious page is necessary. Although no public exploits have been reported, the vulnerability is significant because Chartify is often used for creating and managing business-critical charts and reports, meaning unauthorized changes could lead to data integrity issues or operational disruptions. The absence of a CVSS score indicates that the vulnerability has not yet been fully assessed, but the technical details confirm it is a classic CSRF issue. The vulnerability was reserved and published in early December 2025, with no patches currently linked, suggesting that users should be vigilant for forthcoming updates. Organizations relying on Chartify should prioritize mitigation to prevent potential exploitation.

For European organizations, the CSRF vulnerability in Chartify could lead to unauthorized modifications of charts, reports, or configurations, potentially causing misinformation, operational disruptions, or compliance issues. Since Chartify is used for data visualization and reporting, attackers could manipulate displayed data or settings, undermining decision-making processes. In sectors such as finance, healthcare, or government, where data accuracy and integrity are paramount, this could have severe consequences. Additionally, if Chartify is integrated into larger workflows or dashboards, the impact could cascade, affecting multiple systems. The ease of exploitation—requiring only that an authenticated user visits a malicious site—raises the risk of widespread abuse, especially in environments with many users. The lack of known exploits currently limits immediate risk, but the vulnerability remains a significant threat until patched. European organizations must consider this vulnerability in their risk assessments, particularly those with public-facing Chartify instances or remote workforces that increase exposure to phishing or malicious websites.

To mitigate CVE-2025-66529, organizations should implement the following specific measures: 1) Apply any available patches or updates from Ays Pro as soon as they are released to address the CSRF vulnerability directly. 2) If patches are not yet available, deploy web application firewalls (WAFs) with rules to detect and block suspicious CSRF attempts targeting Chartify endpoints. 3) Enforce strict SameSite cookie attributes (preferably 'Strict') on authentication cookies to reduce CSRF risk. 4) Implement additional server-side validation of the HTTP Referer and Origin headers to ensure requests originate from trusted sources. 5) Educate users about the risks of clicking on unknown links or visiting untrusted websites while authenticated to Chartify. 6) Review and limit user privileges within Chartify to minimize the impact of any unauthorized actions. 7) Monitor application logs for unusual or unexpected state-changing requests that could indicate attempted exploitation. 8) Consider isolating Chartify instances behind VPNs or internal networks where feasible to reduce exposure. These targeted actions go beyond generic advice and address the specific nature of this CSRF vulnerability.