Unauthenticated remote code execution via arbitrary file upload
Published Apr 30, 2026 · Updated Apr 30, 2026
Unrestricted file upload in Weaver e-office before 10.0_20221201 allows remote attackers to execute code through OfficeServer.php. The endpoint accepts multipart FileData content and trusts the FormData-supplied FILENAME, writing PHP content into the web-accessible Document directory. No authentication or user interaction is required; requesting the uploaded file executes attacker-controlled PHP with the web server user's privileges.
Summary
What happened
Unrestricted file upload in Weaver e-office before 10.0_20221201 allows remote attackers to execute code through OfficeServer.php. The endpoint accepts multipart FileData content and trusts the FormData-supplied FILENAME, writing PHP content into the web-accessible Document directory. No authentication or user interaction is required; requesting the uploaded file executes attacker-controlled PHP with the web server user's privileges.
The record
- CVE
- CVE-2022-50993
- Published
- Apr 30, 2026
- Updated
- Apr 30, 2026
- Vendor
- Weaver Network Technology Co., Ltd.
- Product
- e-office
- Classifications
- CWE-434, T1505.003, T1190
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Oct 10, 2022Exploitation reportedShadowserver exploitation evidence
- Apr 30, 2026CVE publishedPublication date reported by the CVE source.
- Apr 30, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0 <10.0_20221201
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- CTTalk OfficeServer.php arbitrary-file-upload reproductionfunctional · demonstrated
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Reported exploitation
- VulnCheck KEV listingknown exploited catalog
- Shadowserver exploitation evidencereported exploitation
Technologies
Your stack
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Your stack
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