# CVE-2021-31820: Information disclosure in Octopus Server

> Attackers with UI access can view plaintext proxy passwords when the web request proxy is configured with authentication.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 18 Aug 2021
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-c5px-3mxp-74qc

## What is CVE-2021-31820?

CVE-2021-31820 is a high-severity vulnerability in Octopus Octopus Server, published on 18 Aug 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

In Octopus Server after version 2018.8.2 if the Octopus Server Web Request Proxy is configured with authentication, the password is shown in plaintext in the UI.

Weakness: CWE-312 (Cleartext Storage of Sensitive Information)

## Which versions are affected by CVE-2021-31820?

It affects 1 product.


Products: Octopus Octopus Server.

## How do I fix CVE-2021-31820?

No fix has been published for CVE-2021-31820 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-31820 being exploited?

There is no known exploitation of CVE-2021-31820 in the wild and no public exploit code.

## Other vulnerabilities in Octopus Octopus Server

- [CVE-2022-2572](https://insights.sbomify.com/CVE-2022-2572/): Auth bypass in Octopus Server (critical 9.8)
- [CVE-2022-2778](https://insights.sbomify.com/CVE-2022-2778/): Security feature bypass in Octopus Server (critical 9.8)
- [CVE-2018-11320](https://insights.sbomify.com/CVE-2018-11320/): Information disclosure in n/a (critical 9.8)
- [CVE-2022-2782](https://insights.sbomify.com/CVE-2022-2782/): Auth bypass in Octopus Server (critical 9.1)
- [CVE-2024-2975](https://insights.sbomify.com/CVE-2024-2975/): Race condition in Octopus Server (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-31820 and fix it if it is affected.

What it is: CVE-2021-31820 is a high-severity vulnerability in Octopus Octopus Server, published on 18 Aug 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2021-31820 in the wild and no public exploit code.

Affected product: Octopus Octopus Server. 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-2021-31820/ (Markdown: https://insights.sbomify.com/CVE-2021-31820/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-31820
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-31820
- OSV: https://osv.dev/vulnerability/CVE-2021-31820

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-31820/
Summaries are generated and may contain mistakes; the official description above is the record.