# CVE-2021-32746: Possible path traversal by use of the `doc` module

> Attackers with access to the enabled doc module can read arbitrary files on the server via path traversal in Icinga Web 2.

- **Severity:** Medium 5.3 (`CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 12 Jul 2021
- **Updated:** 3 Aug 2024
- **Also known as:** DEBIAN-CVE-2021-32746, GHSA-cmgc-h4cx-3v43, UBUNTU-CVE-2021-32746

## What is CVE-2021-32746?

CVE-2021-32746 is a medium-severity path traversal vulnerability in icingaweb2, published on 12 Jul 2021. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

Icinga Web 2 is an open source monitoring web interface, framework and command-line interface. Between versions 2.3.0 and 2.8.2, the `doc` module of Icinga Web 2 allows to view documentation directly in the UI. It must be enabled manually by an administrator and users need explicit access permission to use it. Then, by visiting a certain route, it is possible to gain access to arbitrary files readable by the web-server user. The issue has been fixed in the 2.9.0, 2.8.3, and 2.7.5 releases. As a workaround, an administrator may disable the `doc` module or revoke permission to use it from all users.

Weakness: CWE-22 (Improper Limitation of a Pathname to a Restricted Directory)

## Which versions are affected by CVE-2021-32746?

It affects 1 product.


Products: Icinga Icinga.

## How do I fix CVE-2021-32746?

Upgrade to a fixed version.

## Is CVE-2021-32746 being exploited?

There is no known exploitation of CVE-2021-32746 in the wild and no public exploit code.

## Other vulnerabilities in icingaweb2

- [CVE-2025-48057](https://insights.sbomify.com/CVE-2025-48057/): Icinga 2 certificate renewal might incorrectly renew an invalid certificate (critical 9.3)
- [CVE-2020-29663](https://insights.sbomify.com/CVE-2020-29663/): Security feature bypass in n/a (critical 9.1)
- [CVE-2024-24820](https://insights.sbomify.com/CVE-2024-24820/): Icinga Director configuration is susceptible to Cross-Site Request Forgery (high 8.3)
- [CVE-2018-6535](https://insights.sbomify.com/CVE-2018-6535/): Information disclosure in n/a (high 8.1)
- [CVE-2020-14004](https://insights.sbomify.com/CVE-2020-14004/): Path traversal in n/a (high 7.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-32746 and fix it if it is affected.

What it is: CVE-2021-32746 is a medium-severity path traversal vulnerability in icingaweb2, published on 12 Jul 2021. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2021-32746 in the wild and no public exploit code.

Affected product: icingaweb2. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2021-32746/ (Markdown: https://insights.sbomify.com/CVE-2021-32746/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-32746
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-32746
- OSV: https://osv.dev/vulnerability/CVE-2021-32746

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-32746/
Summaries are generated and may contain mistakes; the official description above is the record.