CVE-2023-50940Network attack vector

Unauthorized privileged actions via unrestricted CORS origins

Published Feb 2, 2024 · Updated Aug 2, 2024

Overly permissive CORS in IBM PowerSC 1.3, 2.0, and 2.1 allows remote attackers to perform unauthorized privileged actions. The PowerSC CORS policy accepts cross-origin requests from arbitrary domains instead of restricting access to trusted origins. A network-reachable interface is sufficient, and neither an account nor user interaction is required to perform the unauthorized action.

CVSS severity5.3
Medium
EPSS probability0.46%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Overly permissive CORS in IBM PowerSC 1.3, 2.0, and 2.1 allows remote attackers to perform unauthorized privileged actions. The PowerSC CORS policy accepts cross-origin requests from arbitrary domains instead of restricting access to trusted origins. A network-reachable interface is sufficient, and neither an account nor user interaction is required to perform the unauthorized action.

The record

CVE
CVE-2023-50940
Published
Feb 2, 2024
Updated
Aug 2, 2024
Vendor
IBM
Product
IBM PowerSC
Classifications
CWE-697, CWE-942, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 2, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 2024Record 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=1.3
  2. Affected versionversion=1.3, 2.0, 2.1
  3. Affected versionversion=2.0
  4. Affected versionversion=2.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

IBM · IBM PowerSCversion=1.3; version=1.3, 2.0, 2.1; version=2.0; version=2.1

Published CVSS scores

9.8NISTCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
5.3IBMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-697Incorrect Comparison
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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