EUVD-2026-39799
GHSA-jg8r-5jh2-v2xj
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/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
Network-accessible endpoint requires low-privilege auth (PR:L); no scope change; limited confidentiality and integrity impact from lockout bypass and account state disclosure.
Primary rating from Vendor (Fluid Attacks).
CVSS VectorVendor: Fluid Attacks
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/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
Lifecycle Timeline
1DescriptionCVE.org
An Improper Authorization vulnerability exists in PayloadCMS version 3.84.1 due to insufficient access control on the account unlock operation.
AnalysisAI
Improper authorization in PayloadCMS 3.84.1 allows low-privilege authenticated users to invoke the account unlock operation without sufficient access control, effectively bypassing the brute-force lockout mechanism protecting other user accounts. Reported by Fluid Attacks, this flaw has both a confidentiality and integrity dimension: attackers can disclose account state information and manipulate the lock status of accounts they do not own. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The attacker must possess a valid authenticated session with at least low-privilege access to the PayloadCMS instance (PR:L per CVSS 4.0 vector). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 vector (AV:N/AC:L/AT:N/PR:L/UI:N) scores 5.3 and correctly reflects that a low-privilege account is required (PR:L), which meaningfully reduces the attack surface compared to an unauthenticated vector. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker self-registers or uses an existing low-privilege account on a PayloadCMS 3.84.1 instance. They identify the account unlock API endpoint (discoverable from the open-source codebase) and submit a crafted request targeting a high-value locked account - such as an administrator whose account was locked after prior failed login attempts - unlocking it without authorization. … |
| Remediation | No vendor-released patch with an exact fixed version has been identified from the provided data. … Detailed patch versions, workarounds, and compensating controls in full report. |
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External POC / Exploit Code
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