CVE-2024-1524
Published: 24 February 2026
Summary
CVE-2024-1524 is a high-severity Authentication Bypass by Spoofing (CWE-290) vulnerability in Wso2 Identity Server. Its CVSS base score is 7.7 (High).
Operationally, ranked at the 25.5th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
The strongest mitigations our analysis identified are NIST 800-53 AC-2 (Account Management) and IA-13 (Identity Providers and Authorization Servers).
Threat & Defense at a Glance
Threat & Defense Details
Mitigating Controls (NIST 800-53 r5)AI
AC-2 Account Management establishes procedures for account provisioning that prevent unauthorized replacement of local user information by federated accounts sharing usernames.
IA-4 Identifier Management ensures unique usernames across local and federated stores, directly mitigating collision-based account overwrites.
IA-13 Identity Providers and Authorization Servers enforces requirements on federated IDPs to avoid risks like Silent JIT provisioning overwriting local accounts.
NVD Description
When the "Silent Just-In-Time Provisioning" feature is enabled for a federated identity provider (IDP) there is a risk that a local user store user's information may be replaced during the account provisioning process in cases where federated users share the…
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same username as local users. There will be no impact on your deployment if any of the preconditions mentioned below are not met. Only when all the preconditions mentioned below are fulfilled could a malicious actor associate a targeted local user account with a federated IDP user account that they control. The Deployment should have: -An IDP configured for federated authentication with Silent JIT provisioning enabled. The malicious actor should have: -A fresh valid user account in the federated IDP that has not been used earlier. -Knowledge of the username of a valid user in the local IDP. -An account at the federated IDP matching the targeted local username.
Deeper analysisAI
CVE-2024-1524 affects deployments using the "Silent Just-In-Time Provisioning" feature enabled for a federated identity provider (IDP), as detailed in WSO2 security advisories. The vulnerability arises during the account provisioning process, where a local user store's user information may be replaced if federated users share the same username as existing local users. There is no impact unless an IDP is configured for federated authentication with Silent JIT provisioning specifically enabled.
A malicious actor can exploit this vulnerability if they possess a fresh valid user account in the federated IDP that has not been used earlier, knowledge of a valid local IDP username, and control of a federated IDP account matching that targeted local username. Successful exploitation allows the actor to associate the targeted local user account with their controlled federated IDP account, replacing local user information. The CVSS score of 7.7 (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L) reflects high confidentiality and integrity impacts with low availability impact, mapped to CWE-290.
The WSO2 security advisory provides details on mitigations at https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2024-3144/.
Details
- CWE(s)