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TI-2021-03172 Aliases CVE-2021-4314GHSA-jrmv-h6h9-gcm3

Improper privilege management in backstage Zowe

Priority LOW 24CWE-269Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Privilege escalation, Security bypass
Confidentiality · integrity · availability
None · Low · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-269 and CWE-287.

Summary

It is possible to manipulate the JWT token without the knowledge of the JWT secret and authenticate without valid JWT token as any user. This is happening only in the situation when zOSMF doesn’t have the APAR PH12143 applied. This issue affects: 1.16 versions to 1.19. What happens is that the services using the ZAAS client or the API ML API to query will be deceived into believing the information in the JWT token is valid when it isn’t. It’s possible to use this to persuade the southbound service that different user is authenticated.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00454 39th percentileScored 2026-11-07
Fix Fixed Zowe (Open Mainframe Project): 1.19.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
backstageZowe1.16.0 to before 1.19.01.19.0Patch availableCNA
  • Zowe Vendorbackstage Affected 1.16.0 to before 1.19.0 Fixed in 1.19.0 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:linuxfoundation:zowe_api_mediation_layer:*:*:*:*:*:*:*:*1.16.0 to before 1.19.0Vulnerablebackstage
  • cpe:2.3:a:linuxfoundation:zowe_api_mediation_layer:*:*:*:*:*:*:*:* Versions 1.16.0 to before 1.19.0 Vulnerable ·backstage

Remediation

  • Fix · CNA Zowe (Open Mainframe Project) Fixed in 1.19.0

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-4314
  2. 2026-10-03 Alias added: GHSA-jrmv-h6h9-gcm3

References

Other 1

  • TI-2024-09095 Conformance validation endpoint discloses detail about service to unauthenticated users CVSS 3.1MEDIUM 5.3
  • TI-2024-09093 Health endpoint offers list of onboarded services to unauthenticated users CVSS 3.1MEDIUM 5.3

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences