CVE-2021-38928Network attack vector

Privileged API actions via unrestricted CORS origins

Published Jan 4, 2023 · Updated Apr 10, 2025

CORS misconfiguration in the B2B API of IBM Sterling B2B Integrator allows remote authenticated users to retrieve sensitive information. The API does not restrict CORS domain names to trusted domains, allowing requests from an untrusted origin to cross the intended trust boundary. Exploitation requires low-privileged authentication and an installed B2B API; successful requests can perform privileged actions or disclose sensitive information.

CVSS severity5.4
Medium
EPSS probability0.38%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

CORS misconfiguration in the B2B API of IBM Sterling B2B Integrator allows remote authenticated users to retrieve sensitive information. The API does not restrict CORS domain names to trusted domains, allowing requests from an untrusted origin to cross the intended trust boundary. Exploitation requires low-privileged authentication and an installed B2B API; successful requests can perform privileged actions or disclose sensitive information.

The record

CVE
CVE-2021-38928
Published
Jan 4, 2023
Updated
Apr 10, 2025
Vendor
IBM
Product
IBM Sterling B2B Integrator
Classifications
CWE-942, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 4, 2023CVE publishedPublication date reported by the CVE source.
  2. Apr 10, 2025Record 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=6.0.0.0 <6.1.2.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

IBM · IBM Sterling B2B Integratorversion=6.0.0.0 <6.1.2.1

Published CVSS scores

5.4IBMCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-942Overly Permissive Cross-domain Whitelist
T1190Exploit Public-Facing Application

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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