EUVD-2026-44572
GHSA-qfmv-m5q8-c558
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/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-reachable endpoint with no privileges required (PR:N per missing auth); low complexity; limited and symmetric CIA impact matching CVSS 4.0 VC/VI/VA:L with no scope change.
Primary rating from Vendor (vuldb).
CVSS VectorVendor: vuldb
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/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
2DescriptionCVE.org
A vulnerability was found in zhinianboke xianyu-auto-reply up to dcb445ad97816ad65299a7580ee0c8c8f929da84. Affected is an unknown function of the file /api/v1/users/ of the component Backend User Endpoint. Performing a manipulation results in missing authorization. The attack may be initiated remotely. The exploit has been made public and could be used. This product uses a rolling release model to deliver continuous updates. As a result, specific version information for affected or updated releases is not available. The patch is named 19fc3282a1bb78a05c34945c088525d20e081cbd. Applying a patch is the recommended action to fix this issue.
AnalysisAI
Missing authorization on the /api/v1/users/ backend user endpoint in xianyu-auto-reply allows remote unauthenticated attackers to access or manipulate user account data without any credentials. The flaw (CWE-862) affects all commits up to dcb445ad97816ad65299a7580ee0c8c8f929da84 in this FastAPI-based Python backend for automating Xianyu marketplace replies. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The `/api/v1/users/` backend endpoint must be network-reachable - either directly internet-exposed or accessible within a local or cloud network segment. … 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:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P) signals low-complexity, unauthenticated network exploitation with a public exploit confirmed, but limits the impact to low-level confidentiality, integrity, and availability on the vulnerable system only - no scope change to adjacent systems. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | A remote attacker identifies a publicly accessible xianyu-auto-reply backend instance and sends a crafted HTTP request directly to the `/api/v1/users/` endpoint without any authentication token. Because the authorization check is absent, the server processes the request and returns or modifies user account data. … |
| Remediation | Apply patch commit 19fc3282a1bb78a05c34945c088525d20e081cbd from https://github.com/zhinianboke/xianyu-auto-reply/commit/19fc3282a1bb78a05c34945c088525d20e081cbd and pull the latest HEAD from the main branch, as the rolling release model means no discrete patched release version exists. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same weakness CWE-862 – Missing Authorization
View allSame technique Authentication Bypass
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External POC / Exploit Code
Leaving vuln.today