CVE-2023-50936Network attack vector

User impersonation via logout session reuse

Published Feb 2, 2024 · Updated Aug 2, 2024

Session expiration failure in IBM PowerSC 1.3, 2.0, and 2.1 allows remote authenticated users to impersonate another user after logout. The logout path leaves the prior authenticated session valid instead of invalidating its server-side credential. Authenticated access is required, and reuse of the still-valid session grants the prior user's authority.

CVSS severity6.3
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

Session expiration failure in IBM PowerSC 1.3, 2.0, and 2.1 allows remote authenticated users to impersonate another user after logout. The logout path leaves the prior authenticated session valid instead of invalidating its server-side credential. Authenticated access is required, and reuse of the still-valid session grants the prior user's authority.

The record

CVE
CVE-2023-50936
Published
Feb 2, 2024
Updated
Aug 2, 2024
Vendor
IBM
Product
IBM PowerSC
Classifications
CWE-613, T1550.004
Attack vector
network
Privileges
authenticated

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, 2.0, 2.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

IBM · IBM PowerSCversion=1.3, 2.0, 2.1

Published CVSS scores

8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
6.3IBM CorporationCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-613Insufficient Session Expiration
T1550.004Web Session Cookie

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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