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CVE-2026-25509

CI4MS Vulnerable to User Email Enumeration via Password Reset Flow

5.3 MediumFix available

CI4MS is a CodeIgniter 4-based CMS skeleton that delivers a production-ready, modular architecture with RBAC authorization and theme support. Prior to version 0.28.5.0, the authentication implementation in CI4MS is vulnerable to email enumeration. An unauthenticated attacker can determine whether an email address is registered in the system by analyzing the application's response during the password reset process. This issue has been patched in version 0.28.5.0.

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
None
Availability
None

Exploit likelihood

0.39%Up 0.3 points since Feb 4, 2026
90%50%10%1%

What each source reports

CVE List Score used 5.3

CI4MS Vulnerable to User Email Enumeration via Password Reset Flow

CI4MS is a CodeIgniter 4-based CMS skeleton that delivers a production-ready, modular architecture with RBAC authorization and theme support. Prior to version 0.28.5.0, the authentication implementation in CI4MS is vulnerable to email enumeration. An unauthenticated attacker can determine whether an email address is registered in the system by analyzing the application's response during the password reset process. This issue has been patched in version 0.28.5.0.

Record
CVE-2026-25509
CVSS 3.1
5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Weakness
CWE-204
Updated
2026-11-02
EUVDEUVD-2026-5163 5.3

CI4MS is a CodeIgniter 4-based CMS skeleton that delivers a production-ready, modular architecture with RBAC authorization and theme support. Prior to version 0.28.5.0, the authentication implementation in CI4MS is vulnerable to email enumeration. An unauthenticated attacker can determine whether an email address is registered in the system by analyzing the application's response during the password reset process. This issue has been patched in version 0.28.5.0.

Record
EUVD-2026-5163
CVSS 3.1
5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Updated
2026-11-02
GitHub AdvisoriesGHSA-654x-9q7r-g966 5.3

CI4MS Vulnerable to User Email Enumeration via Password Reset Flow

Summary

The authentication implementation in CI4MS is vulnerable to email enumeration. An unauthenticated attacker can determine whether an email address is registered in the system by analyzing the application's response during the password reset process.

Vulnerability Details

  • The password reset flow returns different responses based on whether the provided email address exists in the database or not.
  • If the email is registered, the system typically returns a success message (e.g., "Password reset link has been sent").

If the email is not registered, the system returns an error message (e.g., "User not found" or a different HTTP status code).

This discrepancy allows attackers to programmatically "enumerate" or confirm valid user emails, which can then be used for targeted phishing attacks or brute-force attempts.

Steps to Reproduce

  1. Navigate to the password reset page of the CI4MS installation.
  2. Enter an email address that you know is not registered (e.g., [email protected]) and submit. Note the response message/code.
  3. Enter an email address that is registered (e.g., an admin or test account) and submit. Note the different response.
  4. The difference between these two responses confirms the enumeration vulnerability.

Suggested Mitigation

Implement a uniform, generic response for all password reset requests, regardless of whether the email exists. Recommended message: "If an account is associated with this email address, a password reset link has been sent."

Record
GHSA-654x-9q7r-g966
CVSS 3.1
5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Weakness
CWE-203, CWE-204
Updated
2026-11-02
NVD 5.3

CI4MS is a CodeIgniter 4-based CMS skeleton that delivers a production-ready, modular architecture with RBAC authorization and theme support. Prior to version 0.28.5.0, the authentication implementation in CI4MS is vulnerable to email enumeration. An unauthenticated attacker can determine whether an email address is registered in the system by analyzing the application's response during the password reset process. This issue has been patched in version 0.28.5.0.

Record
CVE-2026-25509
CVSS 3.1
5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Weakness
CWE-204, CWE-203
Updated
2026-11-02
OSV 5.3

CI4MS Vulnerable to User Email Enumeration via Password Reset Flow

CI4MS is a CodeIgniter 4-based CMS skeleton that delivers a production-ready, modular architecture with RBAC authorization and theme support. Prior to version 0.28.5.0, the authentication implementation in CI4MS is vulnerable to email enumeration. An unauthenticated attacker can determine whether an email address is registered in the system by analyzing the application's response during the password reset process. This issue has been patched in version 0.28.5.0.

Record
CVE-2026-25509
CVSS 3.1
5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Weakness
CWE-204
Updated
2026-11-02
OSVGHSA-654x-9q7r-g966 5.3

CI4MS Vulnerable to User Email Enumeration via Password Reset Flow

Summary

The authentication implementation in CI4MS is vulnerable to email enumeration. An unauthenticated attacker can determine whether an email address is registered in the system by analyzing the application's response during the password reset process.

Vulnerability Details

  • The password reset flow returns different responses based on whether the provided email address exists in the database or not.
  • If the email is registered, the system typically returns a success message (e.g., "Password reset link has been sent").

If the email is not registered, the system returns an error message (e.g., "User not found" or a different HTTP status code).

This discrepancy allows attackers to programmatically "enumerate" or confirm valid user emails, which can then be used for targeted phishing attacks or brute-force attempts.

Steps to Reproduce

  1. Navigate to the password reset page of the CI4MS installation.
  2. Enter an email address that you know is not registered (e.g., [email protected]) and submit. Note the response message/code.
  3. Enter an email address that is registered (e.g., an admin or test account) and submit. Note the different response.
  4. The difference between these two responses confirms the enumeration vulnerability.

Suggested Mitigation

Implement a uniform, generic response for all password reset requests, regardless of whether the email exists. Recommended message: "If an account is associated with this email address, a password reset link has been sent."

Record
GHSA-654x-9q7r-g966
CVSS 3.1
5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Weakness
CWE-203, CWE-204
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
ci4-cms-erp/ci4ms
Packagist
before 0.28.5.0
0.28.5.0
ci4-cms-erp/ci4ms
Packagist
before 0.28.5.0, plus listed versions
0.21.00.21.10.21.20.21.30.21.3.1
Show 40 moreShow less
0.21.3.20.21.3.30.21.3.40.21.3.50.21.3.60.21.3.70.23.0.00.23.0.10.23.0.20.23.1.00.24.0.00.24.0.160.24.0.180.24.0.190.24.0.200.24.0.270.24.0.420.24.0.450.24.0.600.25.0.00.25.0.10.25.0.20.25.0.300.25.0.390.25.0.430.25.1.00.25.2.00.25.3.00.26.0.00.26.1.00.26.2.00.26.3.00.26.3.10.26.3.20.26.3.30.26.3.40.27.0.00.28.0.00.28.3.00.28.4.0
0.28.5.0

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-2026-25509 is a medium vulnerability (CVSS 5.3) in Ci4-cms-erp Ci4ms, published February 2, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.39%, the 32nd percentile. Fixed in ci4-cms-erp/ci4ms 0.28.5.0.

References

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