CVE-2024-0391
CVE-2024-0391 is a medium-severity vulnerability in Wso2 Identity Server with a CVSS 3.x base score of 5.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-204.
Key facts
- Severity: Medium (CVSS 3.x base score 5.3)
- EPSS exploit prediction: 0% (8th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2024-16187
- Weakness: CWE-204
- Affected product: Wso2 Identity Server
- Published:
- Last modified:
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.
Frequently asked questions
- What is 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.
- How severe is CVE-2024-0391?
- CVE-2024-0391 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
- Is CVE-2024-0391 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (8th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2024-0391?
- CVE-2024-0391 primarily affects Wso2 Identity Server. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2024-0391?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- Does CVE-2024-0391 have an EU (EUVD) identifier?
- Yes. CVE-2024-0391 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-16187.
- When was CVE-2024-0391 published?
- CVE-2024-0391 was published on 2026-05-11 and last updated on 2026-06-17.
References
Affected products (3)
- cpe:2.3:a:wso2:identity_server:*:*:*:*:*:*:*:*
- cpe:2.3:a:wso2:identity_server_as_key_manager:*:*:*:*:*:*:*:*
- cpe:2.3:a:wso2:open_banking_iam:*:*:*:*:*:*:*:*
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