CVE-2022-50993 CRITICAL

CVE-2022-50993: Weaver E-office < 10.0_20221201 Unauthenticated Arbitrary File Read via XmlRpcServlet

Vendor Weaver Network Co., Ltd.
Product E-office
Weakness CWE-434 · Unrestricted file upload
Published April 30, 2026
Last update May 14, 2026

CVSS base score

9.3/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality
Integrity

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

What the vulnerability does

01Description

Weaver (Fanwei) E-office versions prior to 10.0_20221201 contain an unauthenticated arbitrary file upload vulnerability in the OfficeServer.php endpoint that allows remote attackers to upload malicious files by sending multipart POST requests with arbitrary filenames and disguised content types. Attackers can upload PHP webshells to the Document directory and execute them via HTTP GET requests to achieve remote code execution as the web server user. Exploitation evidence was first observed by the Shadowserver Foundation on 2022-10-10 (UTC).

Key dates

02Disclosure timeline

April 30, 2026 CVE published
May 14, 2026 Record updated