Vulnerability in Wso2 Email Otp Authenticator
CVE-2024-0391
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.002 (7.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 8th percentile — 7.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000
Affected products
- Wso2 Email Otp Authenticator — versions 1.0.18, 1.0.24
- Wso2 Identity Server
- Wso2 Identity Server As Key Manager
- Wso2 Open Banking Iam
- Wso2 Carbon Authenticator Library For Emailotp — versions 4.1.0, 4.1.4, 4.1.22
- Wso2 Identity Server — versions 0, 5.10.0, 5.11.0
- Wso2 Identity Server As Key Manager — versions 0, 5.10.0
- Wso2 Open Banking Iam — versions 0, 2.0.0
Weakness classification (CWE)
References
- ed10eef1-636d-4fbe-9993-6890dfa878f8 (vendor-advisory, Vendor Advisory)
Frequently asked questions
- What is CVE-2024-0391?
- CVE-2024-0391 is a medium-severity vulnerability in Wso2 Email Otp Authenticator, classified under Observable Response Discrepancy. CVSS score: 5.3/10. Published 2026-05-11.
- How severe is CVE-2024-0391?
- Medium severity. CVSS v3 base score is 5.3 out of 10.