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Authorization bypass in Ghost comments feature

Priority LOW 28CWE-943Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · None · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub.

Summary

Ghost, a Node.js content management system, is affected from 5.9.0 before 6.44.1. An input validation issue (CWE-943) lets a member with low privileges access comments they are not authorized to view. The attacker needs a valid member account, and the impact is high confidentiality loss.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Description from the CNA

Ghost is a Node.js content management system. From 5.9.0 until 6.44.1, an input validation issue allowed members to access comments they were not authorized to access. This issue is fixed in version 6.44.1.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0026 17th percentileScored 2026-11-07
Fix Fixed Ghost (TryGhost): 6.44.1ghost (npm): 6.44.1

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
TryGhostGhost5.9.0 to before 6.44.16.44.1Patch availableCNA
—ghost (npm)5.9.0 to before 6.44.16.44.1Patch availableGHSA-6q6j-f24j-p477
  • Ghost VendorTryGhost Affected 5.9.0 to before 6.44.1 Fixed in 6.44.1 Patch available CNA
  • ghost (npm) Vendor— Affected 5.9.0 to before 6.44.1 Fixed in 6.44.1 Patch available GHSA-6q6j-f24j-p477

CPE names Threatist (inferred) · 1

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

CPEVersionsRoleVendor
cpe:2.3:a:ghost:ghost:*:*:*:*:*:*:*:*——TryGhost
  • cpe:2.3:a:ghost:ghost:*:*:*:*:*:*:*:* Versions — — ·TryGhost

Remediation

Upgrade Ghost to version 6.44.1, which is the fixed version for the npm package ghost.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

  • Fix · CNA Ghost (TryGhost) Fixed in 6.44.1
  • Fix · GHSA-6q6j-f24j-p477 ghost (npm) Fixed in 6.44.1 Advisory →

Timeline

  1. 2026-10-05 Threatist record created from CVE-2026-105681
  2. 2026-10-06 CISA SSVC decision points changed
  3. 2026-10-06 Priority changed: MEDIUM → LOW
  4. 2026-10-07 Alias added: GHSA-6q6j-f24j-p477
  5. 2026-10-07 Fix available: npm/[email protected] · GHSA-6q6j-f24j-p477
  6. 2026-10-07 CVSS score added · GHSA-6q6j-f24j-p477
  7. 2026-10-07 Weakness changed · GHSA-6q6j-f24j-p477
  8. 2026-10-07 6 new references · GHSA-6q6j-f24j-p477

References

  • TI-2026-21459 Ghost has a SQL Injection in its Content API CVSS 3.1CRITICAL 9.4
  • TI-2022-10277 An arbitrary file upload vulnerability in the file upload module of Ghost v4.39.0 allows… CVSS 3.1CRITICAL 9.8
  • TI-2024-22785 Ghost through 5.85.1 allows remote attackers to bypass an authentication rate-limit… CVSS 3.1CRITICAL 9.1
  • TI-2023-14843 Ghost vulnerable to disclosure of private API fields CVSS 3.1HIGH 7.5
  • TI-2025-09049 Ghost 6.0.6 - SSRF via oEmbed Bookmark CVSS 4.0MEDIUM 6.1
  • TI-2023-20918 Arbitrary file read via symlinks in Ghost CVSS 3.1MEDIUM 6.5
See all 109 →

Sources