CVE-2021-28122

Name: CVE-2021-28122
Creator: NVD / NIST
Published: 2021-03-10T15:15:12.93+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 3.96%

Last modified Jun 17, 2026

CVE-2021-28122 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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. EPSS estimates a 3.96% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

3.96%

89.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-306

Affected Software

Vendor	Product	Versions
Open5gs	Open5gs	>= 2.1.3, <= 2.2.0

References

https://github.com/open5gs/open5gs/compare/v2.2.0...v2.2.1Patch, Third Party Advisory
https://github.com/open5gs/open5gs/issues/837Exploit, Third Party Advisory
https://github.com/open5gs/open5gs/pull/838Patch, Third Party Advisory
https://github.com/open5gs/open5gs/releasesRelease Notes, Third Party Advisory
https://github.com/open5gs/open5gs/compare/v2.2.0...v2.2.1Patch, Third Party Advisory
https://github.com/open5gs/open5gs/issues/837Exploit, Third Party Advisory
https://github.com/open5gs/open5gs/pull/838Patch, Third Party Advisory
https://github.com/open5gs/open5gs/releasesRelease Notes, Third Party Advisory

Timeline

Published: Mar 10, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-28122?

How severe is CVE-2021-28122?

CVE-2021-28122 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 3.96% probability of exploitation in the next 30 days.

How do I fix CVE-2021-28122?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-28122?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST