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CI4MS Vulnerable to User Email Enumeration via Password Reset Flow

Moderate severity GitHub Reviewed Published Feb 2, 2026 in ci4-cms-erp/ci4ms • Updated Feb 11, 2026

Package

composer ci4-cms-erp/ci4ms (Composer)

Affected versions

< 0.28.5.0

Patched versions

0.28.5.0

Description

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., nonexistent@example.com) 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."

References

@bertugfahriozer bertugfahriozer published to ci4-cms-erp/ci4ms Feb 2, 2026
Published to the GitHub Advisory Database Feb 2, 2026
Reviewed Feb 2, 2026
Published by the National Vulnerability Database Feb 3, 2026
Last updated Feb 11, 2026

Severity

Moderate

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

EPSS score

Exploit Prediction Scoring System (EPSS)

This score estimates the probability of this vulnerability being exploited within the next 30 days. Data provided by FIRST.
(27th percentile)

Weaknesses

Observable Discrepancy

The product behaves differently or sends different responses under different circumstances in a way that is observable to an unauthorized actor, which exposes security-relevant information about the state of the product, such as whether a particular operation was successful or not. Learn more on MITRE.

Observable Response Discrepancy

The product provides different responses to incoming requests in a way that reveals internal state information to an unauthorized actor outside of the intended control sphere. Learn more on MITRE.

CVE ID

CVE-2026-25509

GHSA ID

GHSA-654x-9q7r-g966

Source code

Credits

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