THREATPORT/VULNERABILITY/CVE-2021-28122
CRITICAL SEVERITY

CVE-2021-28122

Open5gs vulnerability

CVSS
9.8
EPSS
4.0%
EPSS pct
89th
Exploited
No known
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.
Affected vendor
Open5gs
Affected product
Open5gs
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness type (CWE)
  • CWE-306 — Missing Authentication for Critical Function
Published
2021-03-10

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no privileges, no user interaction. Successful exploitation leads to high impact to confidentiality, high impact to integrity, high impact to availability.

Its EPSS score of 4.0% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 89% of all scored CVEs.

Check your external exposure to CVE-2021-28122

  • Confirm whether Open5gs Open5gs is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2021-28122.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2021-28122

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2021-28122 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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