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Vulnerability Details :

CVE-2024-0391

Summary
Assigner-WSO2
Assigner Org ID-ed10eef1-636d-4fbe-9993-6890dfa878f8
Published At-11 May, 2026 | 08:45
Updated At-11 May, 2026 | 12:46
Rejected At-
Credits

Username Enumeration via Email OTP Flow in Multiple WSO2 Products Allows User Account Discovery

The check user account lock states feature within the email OTP flow fails to validate user input, allowing an attacker to infer the existence of registered user accounts. The discovery of valid usernames can increase the risk of brute-force and social engineering attacks. Attackers can leverage this information to craft targeted phishing campaigns or other malicious activities aimed at tricking users into divulging sensitive data, potentially damaging the organization's reputation and leading to regulatory non-compliance and financial consequences.

Vendors
-
Not available
Products
-
Metrics (CVSS)
VersionBase scoreBase severityVector
Weaknesses
Attack Patterns
Solution/Workaround
References
HyperlinkResource Type
EPSS History
Score
Latest Score
-
N/A
No data available for selected date range
Percentile
Latest Percentile
-
N/A
No data available for selected date range
Stakeholder-Specific Vulnerability Categorization (SSVC)
▼Common Vulnerabilities and Exposures (CVE)
cve.org
Assigner:WSO2
Assigner Org ID:ed10eef1-636d-4fbe-9993-6890dfa878f8
Published At:11 May, 2026 | 08:45
Updated At:11 May, 2026 | 12:46
Rejected At:
▼CVE Numbering Authority (CNA)
Username Enumeration via Email OTP Flow in Multiple WSO2 Products Allows User Account Discovery

The check user account lock states feature within the email OTP flow fails to validate user input, allowing an attacker to infer the existence of registered user accounts. The discovery of valid usernames can increase the risk of brute-force and social engineering attacks. Attackers can leverage this information to craft targeted phishing campaigns or other malicious activities aimed at tricking users into divulging sensitive data, potentially damaging the organization's reputation and leading to regulatory non-compliance and financial consequences.

Affected Products
Vendor
WSO2 LLCWSO2
Product
WSO2 Identity Server
Default Status
unaffected
Versions
Affected
  • From 5.10.0 before 5.10.0.379 (custom)
  • From 5.11.0 before 5.11.0.426 (custom)
  • From 5.11.0 before 5.11.0.431 (custom)
  • From 6.0.0 before 6.0.0.253 (custom)
  • From 6.1.0 before 6.1.0.254 (custom)
  • From 7.0.0 before 7.0.0.131 (custom)

unknown

  • From 0 before 5.10.0 (custom)
Vendor
WSO2 LLCWSO2
Product
WSO2 Open Banking IAM
Default Status
unaffected
Versions
Affected
  • From 2.0.0 before 2.0.0.318 (custom)

unknown

  • From 0 before 2.0.0 (custom)
Vendor
WSO2 LLCWSO2
Product
WSO2 Identity Server as Key Manager
Default Status
unaffected
Versions
Affected
  • From 5.10.0 before 5.10.0.267 (custom)

unknown

  • From 0 before 5.10.0 (custom)
Vendor
WSO2 LLCWSO2
Product
Email OTP Authenticator
Package Name
org.wso2.carbon.identity.local.auth.emailotp:org.wso2.carbon.identity.local.auth.emailotp
Default Status
unknown
Versions
Affected
  • From 1.0.18 before 1.0.18.7 (custom)
Unaffected
  • From 1.0.24 through * (custom)
Vendor
WSO2 LLCWSO2
Product
WSO2 Carbon Authenticator Library For EmailOTP
Package Name
org.wso2.carbon.extension.identity.authenticator.outbound.emailotp:org.wso2.carbon.identity.authenticator.emailotp
Default Status
unknown
Versions
Affected
  • From 4.1.0 before 4.1.0.8 (custom)
  • From 4.1.4 before 4.1.4.9 (custom)
Unaffected
  • From 4.1.22 through * (custom)
Vendor
WSO2 LLCWSO2
Product
WSO2 Carbon Authenticator Library For EmailOTP
Package Name
org.wso2.carbon.extension.identity.authenticator.outbound.emailotp:org.wso2.carbon.extension.identity.authenticator.emailotp.connector
Default Status
unknown
Versions
Affected
  • From 3.0.5 before 3.0.5.8 (custom)
  • From 3.0.24 before 3.0.24.6 (custom)
  • From 3.0.26 before 3.0.26.16 (custom)
Problem Types
TypeCWE IDDescription
CWECWE-204CWE-204 Observable response discrepancy
Type: CWE
CWE ID: CWE-204
Description: CWE-204 Observable response discrepancy
Metrics
VersionBase scoreBase severityVector
3.15.3MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Version: 3.1
Base score: 5.3
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Metrics Other Info
Impacts
CAPEC IDDescription
CAPEC-249CAPEC-249 CAPEC-249: Inferential Information Gathering
CAPEC ID: CAPEC-249
Description: CAPEC-249 CAPEC-249: Inferential Information Gathering
Solutions

Follow the instructions given on https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2024-3115/#solution

Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2024-3115/
vendor-advisory
Hyperlink: https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2024-3115/
Resource:
vendor-advisory
▼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
Information is not available yet
▼National Vulnerability Database (NVD)
nvd.nist.gov
Source:ed10eef1-636d-4fbe-9993-6890dfa878f8
Published At:11 May, 2026 | 10:16
Updated At:11 May, 2026 | 10:16

The check user account lock states feature within the email OTP flow fails to validate user input, allowing an attacker to infer the existence of registered user accounts. The discovery of valid usernames can increase the risk of brute-force and social engineering attacks. Attackers can leverage this information to craft targeted phishing campaigns or other malicious activities aimed at tricking users into divulging sensitive data, potentially damaging the organization's reputation and leading to regulatory non-compliance and financial consequences.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Secondary3.15.3MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Type: Secondary
Version: 3.1
Base score: 5.3
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
CPE Matches
Weaknesses
CWE IDTypeSource
CWE-204Secondaryed10eef1-636d-4fbe-9993-6890dfa878f8
CWE ID: CWE-204
Type: Secondary
Source: ed10eef1-636d-4fbe-9993-6890dfa878f8
Evaluator Description
Evaluator Impact

Evaluator Solution

Vendor Statements
References
HyperlinkSourceResource
https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2024-3115/ed10eef1-636d-4fbe-9993-6890dfa878f8
N/A
Hyperlink: https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2024-3115/
Source: ed10eef1-636d-4fbe-9993-6890dfa878f8
Resource: N/A

Change History

0
Information is not available yet

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