Weaver E-office up to 10.0_20221200 OfficeServer.php unrestricted upload

Summaryinfo

A vulnerability has been found in Weaver E-office up to 10.0_20221200 and classified as critical. This affects an unknown function of the file OfficeServer.php. The manipulation leads to unrestricted upload. This vulnerability is referenced as CVE-2022-50993. Remote exploitation of the attack is possible. No exploit is available. The affected component should be upgraded.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Weaver E-office up to 10.0_20221200. This issue affects an unknown part of the file OfficeServer.php. The manipulation with an unknown input leads to a unrestricted upload vulnerability. Using CWE to declare the problem leads to CWE-434. The product allows the attacker to upload or transfer files of dangerous types that can be automatically processed within the product's environment. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

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).

It is possible to read the advisory at service.e-office.cn. The identification of this vulnerability is CVE-2022-50993 since 04/29/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1608.002 according to MITRE ATT&CK.

By approaching the search of inurl:OfficeServer.php it is possible to find vulnerable targets with Google Hacking.

Upgrading to version 10.0_20221201 eliminates this vulnerability.

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Productinfo

Vendor

• Weaver

Name

• E-office

Version

• 10

CPE 2.3info

• 🔒

CPE 2.2info

• 🔒

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