What’s Vulnerable › Vulnerabilities

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

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-04-30 · updated 2026-06-17
• Weakness: CWE-434

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).

Affected products

• Weaver Network Co., Ltd. E-office: before 10.0_20221201 — fixed in 10.0_20221201

How to fix

Upgrade to a fixed version: Weaver Network Co., Ltd. E-office 10.0_20221201. Check the vendor advisory for mitigations.

References

• https://bbs.chaitin.cn/topic/37
• https://cn-sec.com/archives/1453025.html
• https://service.e-office.cn/knowledge/detail/5
• https://www.vulncheck.com/advisories/weaver-e-office-10-0-20221201-unauthenticated-arbitrary-file-read-via-xmlrpcservlet

Get alerted when CVE-2022-50993 or the next vulnerability affects your stack