# CVE-2021-34765: Cisco Nexus Insights Authenticated Information Disclosure Vulnerability

> Authenticated attackers can bypass RBAC filters to download sensitive files from the Cisco Nexus Insights web UI.

- **Severity:** Medium 4.3 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/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:** No
- **Published:** 2 Sep 2021
- **Updated:** 7 Nov 2024
- **Also known as:** GHSA-4wpv-93cp-fchh

## What is CVE-2021-34765?

CVE-2021-34765 is a medium-severity missing authorization vulnerability in Cisco Nexus Insights, published on 2 Sep 2021. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

A vulnerability in the web UI for Cisco Nexus Insights could allow an authenticated, remote attacker to view and download files related to the web application. The attacker requires valid device credentials. This vulnerability exists because proper role-based access control (RBAC) filters are not applied to file download actions. An attacker could exploit this vulnerability by logging in to the application and then navigating to the directory listing and download functions. A successful exploit could allow the attacker to download sensitive files that should be restricted, which could result in disclosure of sensitive information.

Weakness: CWE-552 (Files or Directories Accessible to External Parties)

## Which versions are affected by CVE-2021-34765?

It affects 1 product.


Products: Cisco Nexus Insights.

## How do I fix CVE-2021-34765?

No fix has been published for CVE-2021-34765 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-34765 being exploited?

There is no known exploitation of CVE-2021-34765 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-34765 and fix it if it is affected.

What it is: CVE-2021-34765 is a medium-severity missing authorization vulnerability in Cisco Nexus Insights, published on 2 Sep 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-2021-34765 in the wild and no public exploit code.

Affected product: Cisco Nexus Insights. 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-2021-34765/ (Markdown: https://insights.sbomify.com/CVE-2021-34765/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-34765
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-34765
- OSV: https://osv.dev/vulnerability/CVE-2021-34765

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From sbomify Insights: https://insights.sbomify.com/CVE-2021-34765/
Summaries are generated and may contain mistakes; the official description above is the record.