# CVE-2021-26715: Server Side Request Forgery (SSRF) in org.mitre:openid-connect-server

> An unauthenticated attacker can exploit an SSRF vulnerability in MITREid Connect to access internal network resources and obtain sensitive data.

- **Severity:** Critical 9.1 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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:** 25 Mar 2021
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-792r-mh2q-p8qp

## What is CVE-2021-26715?

CVE-2021-26715 is a critical server-side request forgery vulnerability in n/a, published on 25 Mar 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The OpenID Connect server implementation for MITREid Connect through 1.3.3 contains a Server Side Request Forgery (SSRF) vulnerability. The vulnerability arises due to unsafe usage of the logo_uri parameter in the Dynamic Client Registration request. An unauthenticated attacker can make a HTTP request from the vulnerable server to any address in the internal network and obtain its response (which might, for example, have a JavaScript payload for resultant XSS). The issue can be exploited to bypass network boundaries, obtain sensitive data, or attack other hosts in the internal network.

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

## Which versions are affected by CVE-2021-26715?

2 open source packages ship an affected version, including org.mitre:openid-connect-server. It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `org.mitre:openid-connect-server` | Maven | All versions to 1.3.3 | None |
| `org.mitre:openid-connect-server` | Maven | All versions to 1.3.3 | None |

Products: Mitreid Connect.

## How do I fix CVE-2021-26715?

No fix has been published for CVE-2021-26715 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-26715 being exploited?

There is no known exploitation of CVE-2021-26715 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2021-27582](https://insights.sbomify.com/CVE-2021-27582/): Autobinding vulnerability in MITREid Connect (critical 9.1)
- [CVE-2020-5497](https://insights.sbomify.com/CVE-2020-5497/): XSS in MITREid Connect (medium 6.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-26715 and fix it if it is affected.

What it is: CVE-2021-26715 is a critical server-side request forgery vulnerability in n/a, published on 25 Mar 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-2021-26715 in the wild and no public exploit code.

Affected packages and fixed versions:
- org.mitre:openid-connect-server (Maven): affected all versions up to 1.3.3; no fix listed
- org.mitre:openid-connect-server (Maven): affected all versions up to 1.3.3; no fix listed

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-2021-26715/ (Markdown: https://insights.sbomify.com/CVE-2021-26715/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-26715
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-26715
- OSV: https://osv.dev/vulnerability/CVE-2021-26715

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-26715/
Summaries are generated and may contain mistakes; the official description above is the record.