---
id: CVE-2026-67196
title: >-
  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 interpola…
summary: >-
  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 interpola…
severity: medium
cvss: 5.4
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N'
cwe:
  - CWE-79
published: '2026-08-04'
updated: '2026-09-09'
sourceUpdated: '2026-09-09T20:35:08.537'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-67196'
references:
  - url: 'https://christbowel.com/blog/perspective-5-0-0-five-cves/'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/perspective-xss-via-debug-plugin-innerhtml-interpolation
    label: disclosure@vulncheck.com
tags:
  - nvd
epss: 0.0015
epssPercentile: 0.04552
ingestedAt: '2026-09-09T21:22:45.522Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.