CVE-2026-25509
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.
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
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 Medium
CVSS: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 Medium
CVSS: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
- Navigate to the password reset page of the CI4MS installation.
- Enter an email address that you know is not registered (e.g., [email protected]) and submit. Note the response message/code.
- Enter an email address that is registered (e.g., an admin or test account) and submit. Note the different response.
- 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 Medium
CVSS: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 Medium
CVSS: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 Medium
CVSS: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
- Navigate to the password reset page of the CI4MS installation.
- Enter an email address that you know is not registered (e.g., [email protected]) and submit. Note the response message/code.
- Enter an email address that is registered (e.g., an admin or test account) and submit. Note the different response.
- 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 Medium
CVSS: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
| Package | Affected | Fixed |
|---|---|---|
ci4-cms-erp/ci4msPackagist |
before 0.28.5.0 | 0.28.5.0 |
ci4-cms-erp/ci4msPackagist |
before 0.28.5.0, plus listed versions 0.21.00.21.10.21.20.21.30.21.3.1 Show 40 moreShow less0.21.3.20.21.3.30.21.3.40.21.3.50.21.3.60.21.3.70.23.0.00.23.0.10.23.0.20.23.1.00.24.0.00.24.0.160.24.0.180.24.0.190.24.0.200.24.0.270.24.0.420.24.0.450.24.0.600.25.0.00.25.0.10.25.0.20.25.0.300.25.0.390.25.0.430.25.1.00.25.2.00.25.3.00.26.0.00.26.1.00.26.2.00.26.3.00.26.3.10.26.3.20.26.3.30.26.3.40.27.0.00.28.0.00.28.3.00.28.4.0 |
0.28.5.0 |
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE 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
github.com/ci4-cms-erp/ci4ms/security/advisories/GHSA-654x-9q7r-g966
github.com/ci4-cms-erp/ci4ms/commit/86be2930d1c54eb7575102563302b2f3bafcb653
nvd.nist.gov/vuln/detail/CVE-2026-25509
github.com/advisories/GHSA-654x-9q7r-g966
github.com/CVEProject/cvelistV5/tree/main/cves/2026/25xxx/CVE-2026-25509.json
github.com/ci4-cms-erp/ci4ms