# CVE-2020-24327: Server-side request forgery in n/a

> An attacker can exploit an SSRF vulnerability in Discourse's email editor to access internal resources or bypass security controls.

- **Severity:** Medium 5.3 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 23 Sep 2021
- **Updated:** 4 Aug 2024
- **Also known as:** BIT-discourse-2020-24327, GHSA-8jmg-vw84-q638

## What is CVE-2020-24327?

CVE-2020-24327 is a medium-severity server-side request forgery vulnerability in Discourse Discourse, published on 23 Sep 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Server Side Request Forgery (SSRF) vulnerability exists in Discourse 2.3.2 and 2.6 via the email function. When writing an email in an editor, you can upload pictures of remote websites.

Weakness: CWE-918 (Server-Side Request Forgery)

## Which versions are affected by CVE-2020-24327?

1 open source package ship an affected version, including discourse. It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `discourse` | Bitnami | From 2.3.2 | 2.3.3, 2.6.1 |

Products: Discourse Discourse.

## How do I fix CVE-2020-24327?

Upgrade discourse to a fixed version for your release line: 2.3.3 or 2.6.1.

## Is CVE-2020-24327 being exploited?

There is no known exploitation of CVE-2020-24327 in the wild and no public exploit code.

## Other vulnerabilities in Discourse Discourse

- [CVE-2021-41163](https://insights.sbomify.com/CVE-2021-41163/): RCE via malicious SNS subscription payload (critical 10.0)
- [CVE-2022-36066](https://insights.sbomify.com/CVE-2022-36066/): Discourse vulnerable to RCE via admins uploading maliciously zipped file (critical 9.1)
- [CVE-2022-39356](https://insights.sbomify.com/CVE-2022-39356/): Discourse user account takeover via email and invite link (high 8.9)
- [CVE-2023-22468](https://insights.sbomify.com/CVE-2023-22468/): Discourse vulnerable to Cross-site Scripting in local oneboxes (high 8.8)
- [CVE-2026-27934](https://insights.sbomify.com/CVE-2026-27934/): Discourse leaks private topic title and post excerpt via user action API endpoint (high 8.7)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-24327 and fix it if it is affected.

What it is: CVE-2020-24327 is a medium-severity server-side request forgery vulnerability in Discourse Discourse, published on 23 Sep 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-2020-24327 in the wild and no public exploit code.

Affected packages and fixed versions:
- discourse (Bitnami): affected from 2.3.2; fixed in 2.3.3, 2.6.1

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-2020-24327/ (Markdown: https://insights.sbomify.com/CVE-2020-24327/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-24327
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-24327
- OSV: https://osv.dev/vulnerability/CVE-2020-24327

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-24327/
Summaries are generated and may contain mistakes; the official description above is the record.