CVE-2021-43974Public exploitNetwork attack vector

Unauthenticated account creation via unguarded registration endpoint

Published Jan 11, 2022 · Updated Aug 4, 2024

Missing authentication in SysAid ITIL 20.4.74 b10 allows remote attackers to create end-user accounts through /enduserreg. The endpoint accepts registration POST data even when the server-side anonymous-registration setting is disabled, because that setting only hides the client form. The instance must have outgoing email configured so the new account receives a password; the flaw grants ordinary account access, while later privilege escalation requires separate vulnerabilities.

CVSS severity5.3
Medium
EPSS probability1.42%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authentication in SysAid ITIL 20.4.74 b10 allows remote attackers to create end-user accounts through /enduserreg. The endpoint accepts registration POST data even when the server-side anonymous-registration setting is disabled, because that setting only hides the client form. The instance must have outgoing email configured so the new account receives a password; the flaw grants ordinary account access, while later privilege escalation requires separate vulnerabilities.

The record

CVE
CVE-2021-43974
Published
Jan 11, 2022
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-306, T1136
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 11, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 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 vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.0NIST NVDAV:N/AC:L/Au:N/C:N/I:P/A:N
5.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

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

Weakness, pattern, technique

CWE-306Missing Authentication for Critical Function
T1136Create Account

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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