CVE-2026-55477: Authenticated Arbitrary File Write via Database Import and Xray Log Path Manipulation

Severity: high (CVSS 7.2 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-06-25 · updated 2026-10-25
Weakness: CWE-73

Description

3X-UI is a web control panel for managing Xray-core servers. Prior to 3.3.1, an authenticated administrator can abuse the database import functionality to achieve arbitrary file write on the host by modifying Xray configuration values stored in the database. This can be leveraged to obtain code execution and persistent access as the user running Xray (including root when Xray is running as root). This vulnerability is fixed in 3.3.1.

Affected products

MHSanaei 3x-ui: before 3.3.1

References

https://github.com/MHSanaei/3x-ui/security/advisories/GHSA-jm48-m3rr-9hgg
https://github.com/MHSanaei/3x-ui/security/advisories/GHSA-jm48-m3rr-9hgg

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