CVE-2026-79314

Horizontal Privilege Escalation via Incomplete Ownership Check in x-ui Proxy Configuration

Published Sep 22, 2026 CVSS 3.1 · 8.8 High EPSS < 1% KEV · Not listed
Description
A horizontal privilege escalation vulnerability exists in x-ui 0.3.2. An authenticated user can modify the inbound proxy configurations of other users, including remark, port, protocol, settings, enabled state, expiry time and traffic quota, by submitting a request referencing the target resource identifier. The update path fails to verify that the target resource belongs to the requesting session user, allowing unauthorized cross-user modification of data.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Title Horizontal Privilege Escalation via Incomplete Ownership Check in x-ui Proxy Configuration
Type Values Removed Values Added
Title Horizontal Privilege Escalation in x‑ui Via Inbound Proxy Configuration Exposure
Weaknesses CWE-285
CWE-640
Type Values Removed Values Added
Weaknesses CWE-284
Metrics cvssV3_1

{'score': 8.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Title Horizontal Privilege Escalation in x‑ui Via Inbound Proxy Configuration Exposure
Weaknesses CWE-285
CWE-640
Type Values Removed Values Added
First Time appeared Vaxilu
Vaxilu x-ui
Vendors & Products Vaxilu
Vaxilu x-ui
Type Values Removed Values Added
Description A horizontal privilege escalation vulnerability exists in x-ui 0.3.2. An authenticated user can modify the inbound proxy configurations of other users, including remark, port, protocol, settings, enabled state, expiry time and traffic quota, by submitting a request referencing the target resource identifier. The update path fails to verify that the target resource belongs to the requesting session user, allowing unauthorized cross-user modification of data.
References
Weaknesses

Sources

Status
PUBLISHED
Assigner
mitre
Published
Updated
Sep 25, 2026, 11:19 PM
Reserved
Aug 25, 2026, 12:00 AM
Status
Deferred
Published
Sep 22, 2026, 3:17 PM
Modified
Sep 26, 2026, 12:16 AM