CVE-2024-1524Network attack vector

Account impersonation via Silent JIT username collision

Published Feb 24, 2026 · Updated Feb 24, 2026

Authentication bypass in WSO2 API Manager 4.2.0 and Identity Server 6.0.0 and 6.1.0 allows remote attackers to impersonate local users. Silent JIT provisioning associates a new federated identity with an existing local account when both identities supply the same username, replacing the local user's information. Exploitation requires Silent JIT, a fresh valid federated account, knowledge of a local username, and a matching username at the federated provider.

CVSS severity7.7
High
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in WSO2 API Manager 4.2.0 and Identity Server 6.0.0 and 6.1.0 allows remote attackers to impersonate local users. Silent JIT provisioning associates a new federated identity with an existing local account when both identities supply the same username, replacing the local user's information. Exploitation requires Silent JIT, a fresh valid federated account, knowledge of a local username, and a matching username at the federated provider.

The record

CVE
CVE-2024-1524
Published
Feb 24, 2026
Updated
Feb 24, 2026
Vendor
WSO2
Product
WSO2 Identity Server
Classifications
CWE-290, T1078
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 24, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 24, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=6.0.0 <6.0.0.171
  2. Affected versionversion=6.1.0 <6.1.0.128

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

WSO2 · WSO2 Identity Serverversion=6.0.0 <6.0.0.171; version=6.1.0 <6.1.0.128
WSO2 · WSO2 API Managerversion=4.2.0 <4.2.0.108

Published CVSS scores

8.1NIST NVDCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
7.7WSO2CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-290Authentication Bypass by Spoofing
T1078Valid Accounts

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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