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CVE Record

CVE-2020-4253: IBM Content Navigator 3.0CD does not invalidate session after logout which could allow an authenticated use...

IBM Content Navigator 3.0CD does not invalidate session after logout which could allow an authenticated user to impersonate another user on the system. IBM X-Force ID: 175559.

MediumCVSS 6.3Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

IBM Content Navigator 3.0CD may leave a user session valid after logout. In a shared or exposed environment, an authenticated person could reuse that session to act as another user. This is a medium-severity identity and access-control issue, not a broad unauthenticated compromise based on the provided sources.

Executive priority

Treat this as a moderate-priority access-control fix. It does not appear to be actively exploited in the provided sources, but it can undermine user accountability and allow impersonation where IBM Content Navigator 3.0CD remains unpatched.

Technical view

The issue is improper session invalidation after logout in IBM Content Navigator 3.0CD. CVSS 3.0 is 6.3 with network attack vector, low privileges required, low complexity, no user interaction, and low confidentiality, integrity, and availability impact. IBM X-Force tracks it as ID 175559.

Likely exposure

Exposure is limited to environments running IBM Content Navigator 3.0CD. Risk is higher where the application is reachable over a network, used by multiple authenticated users, or accessed from shared workstations. The provided bundle does not name other affected versions or products.

Exploitation context

The source bundle does not show CISA KEV listing or active exploitation. The described abuse requires an authenticated context and relies on a session remaining usable after logout. No public exploit status is established by the provided evidence.

Researcher notes

Evidence is clear on the affected product, version, impact, and CVSS vector. The bundle does not include detailed IBM fix levels, workarounds, exploit reports, or CWE mapping, so remediation should be anchored to IBM’s advisory rather than inferred.

Mitigation direction

  • Review IBM advisory node 6116020 for the vendor-supported fix or maintenance level.
  • Prioritize updates for internet-facing or shared-user IBM Content Navigator deployments.
  • Reduce session lifetime where administratively supported by IBM guidance.
  • Ensure users close browsers on shared systems until remediation is confirmed.
  • Monitor IBM X-Force ID 175559 for updated vendor guidance.

Validation and detection

  • Inventory IBM Content Navigator deployments and confirm whether any run version 3.0CD.
  • Compare installed build levels against IBM advisory node 6116020.
  • In staging, verify logout invalidates the server-side session immediately.
  • Review authentication logs for session reuse after logout events.
  • Confirm vulnerability scanners map findings specifically to CVE-2020-4253.
Prepared
Confidence
medium
Sources
4

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

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CVE-2020-4253 mapping review

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Vulnerability profileCVE Program record
Severity
Medium
CVSS
6.3 (3.0)
Known Exploited
No
Published

Vector: CVSS:3.0/PR:L/AC:L/A:L/AV:N/S:U/UI:N/C:L/I:L/RL:O/RC:C/E:U

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

1CVSS vectors
0Timeline events
0ADP providers
3Source links

CVSS vector scores

1 official score

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
6.3CVSS 3.0MediumCVSS:3.0/PR:L/AC:L/A:L/AV:N/S:U/UI:N/C:L/I:L/RL:O/RC:C/E:U2.83.4Primary CVE score

Vulnerability scoring details

Base CVSS 3.0 score

6.3Medium
CVSS 3.0 vector shape for CVE-2020-4253Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.0/PR:L/AC:L/A:L/AV:N/S:U/UI:N/C:L/I:L/RL:O/RC:C/E:U

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
IBMContent Navigator3.0CDListed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.