Riskcovery

CVE-2024-0391

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

State
Published
Severity
5.3 Medium
Published
May 11, 2026
Updated
May 11, 2026
Reserved
Jan 10, 2024

Read the record on cve.org

Description

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.

Scores

CVSSScoreVectorSource
3.15.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:NWSO2

Weaknesses

  • CWE-204 Observable response discrepancy

Affected Products

ProductVersions
WSO2 Identity ServerWSO2
  • before 5.10.0Unknown
  • 5.10.0 to before 5.10.0.379Affected
  • 5.11.0 to before 5.11.0.426Affected
  • 5.11.0 to before 5.11.0.431Affected
  • 6.0.0 to before 6.0.0.253Affected
  • 6.1.0 to before 6.1.0.254Affected
  • 7.0.0 to before 7.0.0.131Affected
WSO2 Open Banking IAMWSO2
  • before 2.0.0Unknown
  • 2.0.0 to before 2.0.0.318Affected
WSO2 Identity Server as Key ManagerWSO2
  • before 5.10.0Unknown
  • 5.10.0 to before 5.10.0.267Affected
Email OTP AuthenticatorWSO2
  • 1.0.18 to before 1.0.18.7Affected
  • 1.0.24 and laterNot affected
WSO2 Carbon Authenticator Library For EmailOTPWSO2
  • 4.1.0 to before 4.1.0.8Affected
  • 4.1.4 to before 4.1.4.9Affected
  • 4.1.22 and laterNot affected
WSO2 Carbon Authenticator Library For EmailOTPWSO2
  • 3.0.5 to before 3.0.5.8Affected
  • 3.0.24 to before 3.0.24.6Affected
  • 3.0.26 to before 3.0.26.16Affected

References

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.