CVE-2025-63260 in SyncFusion
Summary
by MITRE • 03/20/2026
SyncFusion 30.1.37 is vulnerable to Cross Site Scripting (XSS) via the Document-Editor reply to comment field and Chat-UI Chat message.
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Analysis
by VulDB Data Team • 03/27/2026
SyncFusion Document-Editor and Chat-UI components contain cross site scripting vulnerabilities that allow attackers to inject malicious scripts into comment reply fields and chat messages. This vulnerability exists in version 30.1.37 and affects applications that utilize these UI components for collaborative document editing and real-time communication. The flaw occurs when user input is not properly sanitized or escaped before being rendered back to other users within the application interface.
The technical implementation of this vulnerability stems from insufficient input validation and output encoding mechanisms within the Document-Editor's reply to comment functionality and the Chat-UI's message handling system. When users submit comments or chat messages containing script tags or malicious payload code, the application fails to adequately sanitize these inputs before storing and displaying them to other users. This creates an environment where attackers can execute arbitrary javascript code in the context of other users' browsers, potentially leading to session hijacking, data theft, or further exploitation of the compromised user's privileges.
The operational impact of this vulnerability is significant for organizations using SyncFusion components in collaborative environments. Attackers could exploit this weakness to steal user sessions, access sensitive document content, or manipulate chat communications to spread malware. The vulnerability affects both the document collaboration features and real-time chat functionality, making it particularly dangerous in enterprise settings where sensitive information is frequently shared. Users with administrative privileges could be targeted to gain elevated access to the entire document management system, while regular users might face session theft or data exfiltration.
Organizations should immediately upgrade to the latest available version of SyncFusion that addresses this vulnerability. In the interim, implementing proper input sanitization and output encoding measures can provide temporary protection. The vulnerability aligns with CWE-79 which describes cross site scripting flaws in web applications, and follows patterns identified in the ATT&CK framework under T1566 for social engineering techniques. Security teams should also implement content security policies and monitor for suspicious user inputs in comment and chat fields to detect potential exploitation attempts. Additionally, user education regarding the risks of clicking on untrusted links or executing unknown code within collaborative environments remains crucial for overall security posture.