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Description
This issue is automatically created based on existing pull request: #39379: xssFiltrationPattern boundary script tag restriction
Add script boundary as word
If you have an html like:
<body>
<p class="product-description">
hello world product description
</p>
</body>
The problem is the class: product-description
Manual testing scenarios (*)
- Create a CMS Page with content:
<p class="product-description">
hello world product description
</p>
- Save and see error:

Contribution checklist (*)
- Pull request has a meaningful description of its purpose
- All commits are accompanied by meaningful commit messages
- All new or changed code is covered with unit/integration tests (if applicable)
- README.md files for modified modules are updated and included in the pull request if any README.md predefined sections require an update
- All automated tests passed successfully (all builds are green)