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TI-2026-75419 Aliases CVE-2026-111633GHSA-4v4h-58rp-w43w

Authentication bypass in ZKEACMS via hard-coded JWT signing key

Priority HIGH 77CWE-321Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Security bypass
Confidentiality · integrity · availability
Low · High · Low
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-321.

Summary

ZKEACMS through 4.4 from SeriaWei contains an authentication bypass in its REST API. A hard-coded HMAC-SHA256 signing key (CWE-321) lets an unauthenticated remote attacker forge JWT bearer tokens. A forged token with the Name claim set to admin can call protected API endpoints, which allows modifying articles and products and reading form submissions.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

ZKEACMS through 4.4 contains an authentication bypass vulnerability that allows unauthenticated attackers to forge REST API JWT bearer tokens using a hard-coded HMAC-SHA256 signing key in JwtBearerDefaults.cs. Attackers can sign a token with the Name claim set to 'admin' to call ApiAuthorize endpoints, modifying articles and products and reading form submissions.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00439 38th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
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
SeriaWeiZKEACMSup to 4.4—No fix listedCNA
  • ZKEACMS VendorSeriaWei Affected up to 4.4 Fixed in — No fix listed CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:zkea:zkeacms:*:*:*:*:*:*:*:*——SeriaWei
  • cpe:2.3:a:zkea:zkeacms:*:*:*:*:*:*:*:* Versions — — ·SeriaWei

Remediation

The sources list no fixed version for ZKEACMS.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Timeline

  1. 2026-10-16 Threatist record created from CVE-2026-111633
  2. 2026-10-16 Alias added: GHSA-4v4h-58rp-w43w
  3. 2026-10-18 Priority changed: MEDIUM → LOW
  4. 2026-10-23 CISA SSVC decision points changed
  5. 2026-10-23 Priority changed: LOW → HIGH

References

Advisory 1

Other 3

  • TI-2025-32515 An arbitrary file upload vulnerability in ZKEACMS v4.1 allows attackers to execute arbitrary code via a crafted file. CVSS 3.1CRITICAL 9.8
  • TI-2025-10320 SeriaWei ZKEACMS POST Request UrlRedirectionController.cs Delete improper authorization CVSS 4.0MEDIUM 5.3
  • TI-2025-09857 SeriaWei ZKEACMS EventViewerController.cs Download path traversal CVSS 4.0MEDIUM 5.3
  • TI-2025-09855 SeriaWei ZKEACMS Event Action System PendingTaskController.cs Edit server-side request forgery CVSS 4.0MEDIUM 5.3
  • TI-2025-09856 SeriaWei ZKEACMS SEOSuggestions ZKEACMS.SEOSuggestions.dll server-side request forgery CVSS 4.0MEDIUM 5.1
  • TI-2020-13904 An arbitrary file upload vulnerability in /admin/media/upload of ZKEACMS V3.2.0 allows… CVSS 3.1HIGH 8.8
See all 8 →

Sources

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