What’s Vulnerable › Vulnerabilities

CVE-2026-67196: Perspective 5.0.0 XSS via Debug Plugin innerHTML Interpolation

• Severity: medium (CVSS 5.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-04 · updated 2026-10-23
• Weakness: CWE-79

Description

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.

Affected products

• perspective-dev perspective: through 5.0.0

References

• https://christbowel.com/blog/perspective-5-0-0-five-cves/
• https://www.vulncheck.com/advisories/perspective-xss-via-debug-plugin-innerhtml-interpolation

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