TI-2022-26434 Aliases CVE-2022-50993 GHSA-g99j-cq2q-3xrv

Weaver E-office < 10.0_20221201 Unauthenticated Arbitrary File Read via XmlRpcServlet

HIGH 81CWE-434Published 2026-04-30 · Updated 2026-07-15

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Attack requirements: None
Impact type: Code execution
Confidentiality · integrity · availability: High · High · High
Fix status: Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-434.

Summary

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).

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00774 55th percentileScored 2026-11-07

Public exploit Yes 2 exploit referencesTagged by the CNA

Fix Fixed E-office (Weaver Network Co., Ltd.): 10.0_20221201

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: Yes
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Weaver Network Co., Ltd.	E-office	before 10.0_20221201	10.0_20221201	Patch available	CNA

E-office VendorWeaver Network Co., Ltd. Affected before 10.0_20221201 Fixed in 10.0_20221201 Patch available CNA

Remediation

Fix · CNA E-office (Weaver Network Co., Ltd.) Fixed in 10.0_20221201

Timeline

2026-10-02 Threatist record created from CVE-2022-50993
2026-10-03 Alias added: GHSA-g99j-cq2q-3xrv

References

Exploit 2

Patch 1

https://service.e-office.cn/knowledge/detail/5

TI-2022-04582 Weaver E-cology 9.0 File Upload RCE via uploaderOperate.jsp CVSS 4.0CRITICAL 9.3
TI-2025-43962 Unauthenticated SQL injection in Weaver E-cology CVSS 4.0HIGH 8.8
TI-2022-26436 Weaver E-cology 8.0 / 9.0 SQL Injection via HrmCareerApplyPerView.jsp CVSS 4.0HIGH 8.7
TI-2021-22764 Unauthenticated path traversal in Weaver E-cology reads server files CVSS 4.0HIGH 8.7
TI-2019-15817 Weaver E-cology SQL Injection via SyncUserInfo.jsp CVSS 4.0HIGH 8.7
TI-2016-09273 Weaver E-cology 8.0 SQL Injection File Read via SignatureDownLoad CVSS 4.0HIGH 8.7

See all 7 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences