Vulnerability · Published Oct 21, 2026 · Assigned by WSO2
CVE-2024-7478Username Enumeration via External User Stores in Multiple WSO2 Products Allows User Account Discovery
Medium 5.8
In plain English
A medium-severity security flaw in WSO2 API Manager from WSO2. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 15% of all known vulnerabilities).
Official description
When a WSO2 product is configured to use an external user store, the system fails to adequately obscure the existence or validity of usernames during authentication attempts. This oversight allows an attacker to repeatedly query the authentication mechanism with different username guesses, enabling the enumeration of valid usernames present in the external user store. The discovery of valid usernames can increase the risk of targeted brute-force attacks, social engineering, and information leakage. Attackers can leverage this information to craft more convincing phishing campaigns or other social engineering tactics to trick users into revealing sensitive data. The presence of username enumeration could also negatively impact an organization's reputation, leading to loss of customer trust, regulatory non-compliance, and potential legal and financial repercussions.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| WSO2 | WSO2 API Manager | 3.1.0 – before 3.1.0.3103.2.0 – before 3.2.0.4013.2.1 – before 3.2.1.264.0.0 – before 4.0.0.3184.1.0 – before 4.1.0.1804.2.0 – before 4.2.0.1194.3.0 – before 4.3.0.30 |
| WSO2 | WSO2 Identity Server as Key Manager | 5.10.0 – before 5.10.0.320 |
| WSO2 | WSO2 Identity Server | 5.10.0 – before 5.10.0.3266.0.0 – before 6.0.0.2146.1.0 – before 6.1.0.1987.0.0 – before 7.0.0.67 |
| WSO2 | WSO2 Open Banking IAM | 2.0.0 – before 2.0.0.371 |
| WSO2 | WSO2 Open Banking AM | 2.0.0 – before 2.0.0.351 |
| WSO2 | WSO2 Carborn Identity Handler | 1.4.0 – before 1.4.0.151.4.0 – before 1.4.0.161.4.11 – before 1.4.11.141.4.37 – before 1.4.37.11.6.1 – before 1.6.1.51.7.1 – before 1.7.1.11.8.6 – before 1.8.6.51.8.14 – before 1.8.14.1 |
Weakness: CWE-204 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N