CVE-2026-67196 in Perspective
Summary
by MITRE • 08/04/2026
Perspective 5.0.0 contains a cross-site scripting vulnerability in the built-in Debug plugin that allows attackers to inject arbitrary HTML and JavaScript by writing table cell values containing unescaped HTML markup, which are interpolated directly into innerHTML during CSV serialization rendering. Attackers can craft table rows with payloads such as unquoted attribute injections containing event handler attributes that bypass RFC 4180 quoting, since angle brackets and event handler attributes are never escaped before assignment, causing malicious scripts to execute in the embedding page's origin.
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Analysis
by VulDB Data Team • 08/04/2026
This vulnerability exists within Perspective 5.0.0's built-in Debug plugin where improper input validation allows cross-site scripting attacks through CSV serialization rendering processes. The flaw occurs when table cell values containing unescaped HTML markup are written and subsequently interpolated directly into innerHTML during CSV export operations. This represents a classic server-side template injection vulnerability that enables arbitrary code execution within the victim's browser context, as described by CWE-79 in the Common Weakness Enumeration catalog.
The technical implementation of this vulnerability exploits the lack of proper HTML escaping mechanisms during CSV serialization processes. When attackers craft table rows with unquoted attribute injections containing event handler attributes such as onclick= or onerror=, these payloads bypass RFC 4180 quoting standards because angle brackets and event handler attributes are never escaped before assignment to innerHTML elements. This specific weakness creates a persistent cross-site scripting vector that operates at the DOM level rather than traditional input validation points.
The operational impact of this vulnerability extends beyond simple script execution as it enables attackers to perform session hijacking, credential theft, and data exfiltration from users interacting with affected systems. Since the malicious scripts execute in the embedding page's origin, they can leverage existing user sessions and permissions to access sensitive information or modify application state. This vector aligns with ATT&CK technique T1566.001 for initial access through spearphishing attachments and T1059.007 for command and scripting interpreter through PowerShell or JavaScript execution.
Mitigation strategies should focus on implementing comprehensive input sanitization at multiple layers including immediate HTML escaping of all user-supplied content before CSV serialization, strict validation of table cell data against RFC 4180 standards, and deployment of Content Security Policy headers to restrict script execution. Additionally, organizations should consider disabling the Debug plugin in production environments and implementing proper output encoding mechanisms that prevent direct innerHTML assignment with untrusted data sources. The vulnerability demonstrates the critical importance of secure coding practices around DOM manipulation and input handling as outlined in OWASP Top 10 security principles.
This particular flaw represents a dangerous intersection of poor data validation and insecure DOM operations, where the combination creates a persistent threat vector that can be exploited across multiple user sessions without requiring additional authentication or privilege escalation. The vulnerability's persistence stems from its integration within core application functionality rather than isolated endpoints, making it particularly dangerous for organizations that rely heavily on table-based data visualization features. Security teams should prioritize patching this vulnerability while implementing comprehensive monitoring for suspicious CSV export activities and anomalous user behavior patterns that may indicate exploitation attempts.