CVE-2021-25863Public exploit

Administrative takeover via network-exposed default credentials

Published Jan 26, 2021 · Updated Aug 3, 2024

Improper authentication in Open5GS WebUI 2.1.3 allows remote attackers to obtain administrative access using default credentials. When MongoDB contains no account, server initialization registers admin with password 1423 while the WebUI defaults to binding on 0.0.0.0:3000. Any network-reachable deployment retaining that credential exposes subscriber-data administration to unauthenticated login attempts.

CVSS severity8.8
High
EPSS probability1.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper authentication in Open5GS WebUI 2.1.3 allows remote attackers to obtain administrative access using default credentials. When MongoDB contains no account, server initialization registers admin with password 1423 while the WebUI defaults to binding on 0.0.0.0:3000. Any network-reachable deployment retaining that credential exposes subscriber-data administration to unauthenticated login attempts.

The record

CVE
CVE-2021-25863
Published
Jan 26, 2021
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-287, T1078.001
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 26, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

8.3NIST NVDAV:A/AC:L/Au:N/C:C/I:C/A:C
8.8NIST NVDCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-287Improper Authentication
T1078.001Valid Accounts: Default Accounts

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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