EUVD-2026-90672
GHSA-v827-452p-mh2j
Severity by source
CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
AC:H and PR:L because exploitation presupposes an already-stolen valid session cookie; network-reachable with full account takeover of that user (C:H/I:H), no availability impact.
Primary rating from Vendor (VulnCheck).
CVSS VectorVendor: VulnCheck
Lifecycle Timeline
6DescriptionCVE.org
Ghost versions from 3.10.0 before 6.34.0 fail to fully invalidate all sessions after a password change. Attackers with a stolen session cookie can maintain access to user accounts even after the associated user changes their password.
Articles & Coverage 1
AnalysisAI
Session invalidation bypass in Ghost 3.10.0 up to but not including 6.34.0 allows an attacker who already possesses a stolen session cookie to retain authenticated access after the legitimate user changes their password. The flaw is CWE-613 (insufficient session expiration); the assessed vector requires a pre-existing session (PR:L, AT:P, AC:H) and leads to high confidentiality and integrity impact once that prerequisite is met. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the attacker to ALREADY possess a valid, stolen session cookie for a Ghost user account (obtained via a separate vector such as XSS, network interception, or physical/shared-machine access) - this is the attack requirement captured by AT:P/AC:H and the single largest limiting factor. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | This is a CWE-613 insufficient-session-expiration flaw: after a user changes their password, Ghost fails to invalidate all pre-existing sessions, so an attacker holding a stolen session cookie retains access. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Upgrade Ghost to 6.34.0 or later, the vendor-released patched version indicated by the affected range ending before 6.34.0; see the vendor advisory at https://github.com/TryGhost/Ghost/security/advisories/GHSA-v9vj-6fq5-99xj and the VulnCheck advisory at https://www.vulncheck.com/advisories/ghost-3.10.0-before-6.34.0-session-invalidation-bypass. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify every Ghost instance in the estate and record its exact version, then force-expire all active sessions and rotate administrative credentials on any instance running 3.10.0 through 6.33.x, prioritizing internet-facing and staff-accessible deployments. …
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Same weakness CWE-613 – Insufficient Session Expiration
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External POC / Exploit Code
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