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Description

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).

PUBLISHED Reserved 2026-04-29 | Published 2026-04-30 | Updated 2026-04-30 | Assigner VulnCheck




CRITICAL: 9.3CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CRITICAL: 9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Problem types

CWE-434 Unrestricted Upload of File with Dangerous Type

Product status

Default status
affected

Any version before 10.0_20221201
affected

Credits

The Shadowserver Foundation finder

References

service.e-office.cn/knowledge/detail/5 release-notes patch

cn-sec.com/archives/1453025.html technical-description exploit

bbs.chaitin.cn/topic/37 technical-description exploit

www.vulncheck.com/...d-arbitrary-file-read-via-xmlrpcservlet third-party-advisory

cve.org (CVE-2022-50993)

nvd.nist.gov (CVE-2022-50993)

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