# CVE-2021-27329: Server-side request forgery in n/a

> An attacker can exploit a Server-Side Request Forgery vulnerability in Friendica to perform DNS lookups or HTTP requests to arbitrary domains.

- **Severity:** Critical 10.0 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 18 Feb 2021
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-hg8j-9w2x-wj66

## What is CVE-2021-27329?

CVE-2021-27329 is a critical server-side request forgery vulnerability in n/a, published on 18 Feb 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Friendica 2021.01 allows SSRF via parse_url?binurl= for DNS lookups or HTTP requests to arbitrary domain names.

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

## Which versions are affected by CVE-2021-27329?

It affects 1 product.


Products: Frendi Frendica.

## How do I fix CVE-2021-27329?

No fix has been published for CVE-2021-27329 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-27329 being exploited?

There is no known exploitation of CVE-2021-27329 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-27329 and fix it if it is affected.

What it is: CVE-2021-27329 is a critical server-side request forgery vulnerability in n/a, published on 18 Feb 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-2021-27329 in the wild and no public exploit code.

Affected product: n/a. 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-2021-27329/ (Markdown: https://insights.sbomify.com/CVE-2021-27329/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-27329
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-27329
- OSV: https://osv.dev/vulnerability/CVE-2021-27329

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-27329/
Summaries are generated and may contain mistakes; the official description above is the record.