Security readout for executives and security teams
Plain-English summary
IBM WebSphere Application Server Liberty has a security restriction bypass issue tied to improper session validation. A remote attacker with low privileges may affect confidentiality, integrity, and availability at a limited level. The provided sources do not show known active exploitation.
Executive priority
Treat this as a moderate-priority platform issue. It is not presented as actively exploited, but session validation weaknesses can undermine trust boundaries in business applications. Prioritize exposed Liberty services and systems handling sensitive workflows.
Technical view
CVE-2019-4304 affects IBM WebSphere Application Server Liberty. The CVSS 3.0 vector is network-accessible, low complexity, low privileges required, no user interaction, unchanged scope, with low C/I/A impact. IBM X-Force ID 160950 identifies the issue as session-related, but the bundle does not provide version-level fix details.
Likely exposure
Exposure is most likely where IBM WebSphere Application Server Liberty is deployed, especially for network-reachable applications using authenticated sessions. The bundle names Liberty only and does not identify specific affected release ranges.
Exploitation context
The CVE is not listed as KEV in the supplied bundle. CVSS indicates exploitation would require low privileges but no user interaction. The temporal vector reports exploit maturity as unproven, so active exploitation should not be assumed from these sources.
Researcher notes
The source bundle lacks detailed affected versions, fixed releases, and proof-of-concept status. Analysis should stay anchored to IBM’s advisory and X-Force ID 160950. Do not infer broader WebSphere exposure beyond Liberty from the provided evidence.
Mitigation direction
- Review IBM advisory and X-Force entry for vendor-approved remediation guidance.
- Inventory WebSphere Application Server Liberty deployments and ownership.
- Prioritize updates for Internet-facing or high-value authenticated applications.
- Restrict network access to Liberty applications where business allows.
- Monitor IBM support channels for exact fixed levels and operational guidance.
Validation and detection
- Confirm whether any deployed WebSphere Application Server instances use Liberty.
- Compare installed Liberty levels against IBM’s advisory once accessed.
- Identify Internet-facing Liberty applications with authenticated session flows.
- Review security logs for unusual authenticated session behavior.
- Track remediation status by application owner and deployment environment.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
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-2019-4304 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 6.3 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/PR:L/AC:L/I:L/A:L/C:L/UI:N/AV:N/S:U/RL:O/E:U/RC:C
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.
CVSS vector scores
1 official scoreWe 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.
CVSS:3.0/PR:L/AC:L/I:L/A:L/C:L/UI:N/AV:N/S:U/RL:O/E:U/RC:C2.83.4Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
6.3MediumVector: CVSS:3.0/PR:L/AC:L/I:L/A:L/C:L/UI:N/AV:N/S:U/RL:O/E:U/RC:C
Source materials
- CVE List V5 sourceCVE List V5
- https://www.ibm.com/support/pages/node/960171CVE reference · x_refsource_CONFIRM
- ibm-websphere-cve20194304-session-fixation (160950)CVE reference · vdb-entry, x_refsource_XF
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.