CVE-2025-26893 identifies a DOM-based Cross-site Scripting (XSS) vulnerability in Easy Charts, a data visualization tool developed by Kiran Potphode. The vulnerability stems from improper neutralization of user-supplied input during the generation of web pages, specifically within client-side scripts that dynamically manipulate the Document Object Model (DOM). This flaw allows an attacker to inject malicious JavaScript code that executes in the context of the victim's browser when they interact with a crafted URL or manipulated input. Unlike reflected or stored XSS, DOM-based XSS occurs entirely on the client side, making detection and mitigation more challenging. The affected versions include all releases up to and including version 1.2.3. No patches or fixes have been published yet, and no known exploits have been reported in the wild. The vulnerability can be leveraged to steal session cookies, perform actions on behalf of the user, or redirect users to malicious sites, compromising confidentiality and integrity. Since exploitation requires user interaction but no authentication, the attack surface includes any user accessing vulnerable instances of Easy Charts. The lack of a CVSS score necessitates an independent severity assessment based on impact and exploitability factors.

The primary impact of this DOM-based XSS vulnerability is the potential compromise of user sessions and data confidentiality within applications using Easy Charts. Attackers can execute arbitrary scripts in the victim's browser, leading to theft of sensitive information such as authentication tokens, personal data, or business intelligence reports. This can result in unauthorized actions performed on behalf of users, data manipulation, or redirection to phishing or malware sites. For organizations, this undermines trust in their data visualization tools and can lead to data breaches or compliance violations. The vulnerability affects the availability of secure user interactions by enabling attackers to disrupt normal workflows or inject misleading information. Since Easy Charts is used globally for data visualization, the scope of affected systems can be broad, especially in sectors relying heavily on web-based analytics dashboards. The absence of known exploits currently limits immediate widespread damage, but the vulnerability remains a significant risk if weaponized.

Organizations should implement multiple layers of defense to mitigate this DOM-based XSS vulnerability. First, apply patches or updates from the vendor as soon as they become available. In the absence of official fixes, developers should review and sanitize all user inputs that influence DOM manipulation, employing strict input validation and output encoding techniques to neutralize potentially malicious scripts. Implement Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts and reduce the impact of injected code. Employ security-focused code reviews and automated scanning tools to detect unsafe DOM manipulations. Educate users about the risks of clicking on suspicious links and encourage the use of updated browsers with built-in XSS protections. Additionally, monitor web application logs for unusual activity that may indicate exploitation attempts. For organizations deploying Easy Charts internally, consider isolating the application environment and restricting access to trusted users to minimize exposure.