EUVD-2026-39020Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Public API target gives AV:N and PR:N; brute-force enumeration raises AC slightly but L is defensible given no special preconditions; C:L reflects partial private-field disclosure without full system confidentiality loss.
Primary rating from Vendor (GitHub_M).
CVSS VectorVendor: GitHub_M
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Lifecycle Timeline
2DescriptionCVE.org
Ghost is a Node.js content management system. From 5.46.1 until 6.21.2, the validation applied to filters on the public API endpoints could be partially bypassed, making it possible to reveal private fields via a brute force attack. If SQLite was used as the database password hashes were fully accessible. If MySQL was used as the database the password hashes' case (uppercase / lowercase) would have been lost, which would likely have rendered a further brute force attack on the discovered hashes fruitless. This vulnerability is fixed in 6.21.2.
AnalysisAI
Filter validation bypass in Ghost CMS public API endpoints exposes private fields - including password hashes - to unauthenticated remote attackers via repeated brute-force probing. Instances running SQLite are most severely impacted: full password hashes are recoverable, enabling offline cracking. …
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Attack ChainAIDerived
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Vulnerability AssessmentAI
| Exploitation | No authentication is required; the attack targets public API endpoints accessible to any network client. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 vector (AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N, score 5.3) scores this as a Medium, and that framing is broadly consistent with real-world risk - with one important caveat. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An unauthenticated attacker sends a high volume of crafted HTTP requests to Ghost's public API, each embedding filter expressions that reference private model fields (such as password hash columns) with specific value predicates. By observing whether the API returns results or not, the attacker enumerates field contents character by character or range by range - a classic filter oracle attack. … |
| Remediation | Upgrade to Ghost 6.21.2 or later, which is the vendor-confirmed patched release per the GitHub Security Advisory at https://github.com/TryGhost/Ghost/security/advisories/GHSA-jx35-x7fj-vgpr. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same weakness CWE-200 – Information Exposure
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