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CVE-2026-46721

Broken Access Control in extension "Frontend User Registration" (sf_register)

6.9 MediumFix available

The create and edit flows do not restrict which user properties may be submitted and do not enforce access control on the frontend user group assignment. As a result, an attacker can assign an arbitrary frontend user group to a newly registered or edited account, gaining unauthorized access to content and functionality restricted to privileged frontend user groups.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
Low
Integrity
Low
Availability
None

Exploit likelihood

0.36%Up 0.3 points since May 19, 2026
90%50%10%1%

What each source reports

CVE List Score used 6.9

Broken Access Control in extension "Frontend User Registration" (sf_register)

The create and edit flows do not restrict which user properties may be submitted and do not enforce access control on the frontend user group assignment. As a result, an attacker can assign an arbitrary frontend user group to a newly registered or edited account, gaining unauthorized access to content and functionality restricted to privileged frontend user groups.

Record
CVE-2026-46721
CVSS 4.0
6.9 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
Weakness
CWE-915, CWE-639
Updated
2026-11-02
EUVDEUVD-2026-30857 6.9

The create and edit flows do not restrict which user properties may be submitted and do not enforce access control on the frontend user group assignment. As a result, an attacker can assign an arbitrary frontend user group to a newly registered or edited account, gaining unauthorized access to content and functionality restricted to privileged frontend user groups.

Record
EUVD-2026-30857
CVSS 4.0
6.9 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
Updated
2026-11-02
GitHub AdvisoriesGHSA-v348-vr4q-fv9p 6.9

TYPO3 sf_register extension allows unauthorized assignment of frontend user groups

The create and edit flows in the TYPO3 extension sf_register do not restrict which user properties may be submitted, and do not enforce access control on the frontend user group assignment. As a result, an attacker can assign an arbitrary frontend user group to a newly registered or edited account, gaining unauthorized access to content and functionality restricted to privileged frontend user groups.

Record
GHSA-v348-vr4q-fv9p
CVSS 4.0
6.9 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
Weakness
CWE-639
Updated
2026-11-02
NVD 6.9

The create and edit flows do not restrict which user properties may be submitted and do not enforce access control on the frontend user group assignment. As a result, an attacker can assign an arbitrary frontend user group to a newly registered or edited account, gaining unauthorized access to content and functionality restricted to privileged frontend user groups.

Record
CVE-2026-46721
CVSS 4.0
6.9 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Weakness
CWE-639, CWE-915
Updated
2026-11-02
OSV 6.9

Broken Access Control in extension "Frontend User Registration" (sf_register)

The create and edit flows do not restrict which user properties may be submitted and do not enforce access control on the frontend user group assignment. As a result, an attacker can assign an arbitrary frontend user group to a newly registered or edited account, gaining unauthorized access to content and functionality restricted to privileged frontend user groups.

Record
CVE-2026-46721
CVSS 4.0
6.9 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
Weakness
CWE-639, CWE-915
Updated
2026-11-02
OSVGHSA-v348-vr4q-fv9p 6.9

TYPO3 sf_register extension allows unauthorized assignment of frontend user groups

The create and edit flows in the TYPO3 extension sf_register do not restrict which user properties may be submitted, and do not enforce access control on the frontend user group assignment. As a result, an attacker can assign an arbitrary frontend user group to a newly registered or edited account, gaining unauthorized access to content and functionality restricted to privileged frontend user groups.

Record
GHSA-v348-vr4q-fv9p
CVSS 4.0
6.9 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
Weakness
CWE-639
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
evoweb/sf-register
Packagist
14.0.0 up to 14.0.2
14.0.2
evoweb/sf-register
Packagist
before 13.2.4
13.2.4
evoweb/sf-register
Packagist
14.0.0 up to 14.0.2, plus listed versions
14.0.1
14.0.2
evoweb/sf-register
Packagist
before 13.2.4, plus listed versions
10.0.010.0.110.0.210.1.010.1.1
Show 45 moreShow less
10.1.210.1.310.1.410.1.510.1.610.1.710.2.011.0.011.1.011.1.111.1.211.1.311.1.411.1.512.0.012.0.113.0.013.0.113.1.013.1.113.1.213.1.313.1.413.2.013.2.113.2.213.2.36.2.98.7.08.7.18.7.28.7.38.8.08.8.18.8.28.8.38.8.48.8.58.8.69.0.09.1.09.2.09.3.09.4.09.4.1
13.2.4

History

History
RecordedChangedSources
first indexedCVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-46721 is a medium vulnerability (CVSS 6.9) in Typo3 Extension "frontend User Registration", published May 19, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.36%, the 30th percentile. Fixed in evoweb/sf-register 14.0.2.

References

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