CVE-2025-12344
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedA vulnerability has been found in Yonyou U8 Cloud up to 5.1sp. The impacted element is an unknown function of the file /service/NCloudGatewayServlet of the component Request Header Handler. Such manipulation of the argument ts/sign leads to unrestricted upload. The attack may be performed from remote. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · moderate confidenceYonyou U8 Cloud contains an unrestricted file upload vulnerability in the NCloudGatewayServlet component's Request Header Handler. The vulnerability is exploitable remotely via manipulation of the ts/sign arguments in HTTP request headers, allowing attackers to upload arbitrary files without proper validation.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- Low
- Integrity
- Low
- Availability
- Low
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Confirm Yonyou U8 Cloud installationIdentify if the target system runs Yonyou U8 Cloud by reviewing installed software, scanning for known Yonyou U8 Cloud HTTP response banners, or checking for the presence of U8 Cloud application directories on the server.Affected if The system is running any version of Yonyou U8 Cloud.
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Locate NCloudGatewayServlet endpointSearch for the NCloudGatewayServlet component in the web application directory structure or by attempting HTTP requests to common paths such as /servlet/NCloudGatewayServlet or /NCloudGatewayServlet, and inspect the server response.Affected if The NCloudGatewayServlet endpoint is exposed and accessible via HTTP.
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Verify ts/sign header parameter acceptanceSend a test HTTP request to the NCloudGatewayServlet endpoint with modified ts and sign header parameters (for example, ts=任意值&sign=任意值) and observe whether the server accepts or processes them without rejecting the request.Affected if The server accepts and processes requests with arbitrary ts/sign header values without validation errors.
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Check for unrestricted upload behaviorSubmit an HTTP request with a Content-Type indicating an executable file (such as .jsp or .asp) in the request headers to NCloudGatewayServlet and verify whether the server permits the upload without performing file type validation.Affected if The servlet allows uploading files with executable extensions without rejecting them.
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Inspect upload directory for unexpected filesReview the web application upload directory (commonly the upload or attachments folder within the Yonyou U8 Cloud webroot) for newly created files that were not uploaded through legitimate business processes, especially executable scripts.Affected if Unexpected executable files appear in upload directories.
If Yonyou U8 Cloud is running with the NCloudGatewayServlet endpoint exposed and accepting arbitrary ts/sign header parameters without validation, the environment is likely affected by this CVE.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
From vendor dataImplement strict input validation and sanitization on the ts/sign request header parameters in NCloudGatewayServlet, including file type restrictions, filename sanitization, and upload location controls. Consider applying vendor patches once available or implementing WAF rules as an interim control.
- Consultation4.0 h
- Implementation8.0 h
- Testing4.0 h
- Review / QA3.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2025-12344 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2025-12344 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
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- Version or environment caveats, and links to real fixes
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