dbcve.org
Education And Training SystemApplication · Hzmanyun

CVE-2025-1555

CRITICAL · 9.8 CVSS v3.1 Published 2025-02-21
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
100/100
Remediation priority · Urgent
Remotely reachable No privileges Zero-click

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 · unedited
A vulnerability classified as critical was found in hzmanyun Education and Training System 3.1.1. This vulnerability affects the function saveImage. The manipulation of the argument file leads to unrestricted upload. The attack can be initiated remotely. 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 confidence

Unrestricted file upload vulnerability in the saveImage function of hzmanyun Education and Training System 3.1.1 allows remote attackers to upload arbitrary files by manipulating the file argument, potentially leading to remote code execution.

MitigationImplement strict file type validation (allowlist approach), rename uploaded files, store uploads outside web root, add authentication requirements to the upload endpoint, and consider implementing file content scanning.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
Education And Training SystemApplication
Affected:= 3.1.1

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
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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 checks

Work through these to decide whether this CVE applies to you.

  1. Identify Hzmanyun Education and Training System version
    Check the application's About page, footer, or response headers for version information. Common paths include /about.html, /version, or inspecting the main page HTML for version strings like '3.1.1'.
    Affected if The installed version is exactly 3.1.1 (the only affected version per vendor disclosure)
  2. Locate the saveImage upload endpoint
    Search web application directories for files containing 'saveImage' function. Common paths may include /upload/, /api/upload, or source files like upload.php, imageHandler.php in the web root.
    Affected if The saveImage function exists in the codebase and is accessible via HTTP
  3. Check if upload functionality is publicly accessible
    Review authentication requirements on the identified upload endpoint. Attempt a test request (without sending actual files) to see if the endpoint responds without authentication.
    Affected if The endpoint accepts requests without requiring login or valid session credentials
  4. Verify file type validation is absent or weak
    Examine the saveImage function source code for file type checking. Look for absence of allowlist validation, missing MIME type checks, or weak extensions-only validation.
    Affected if No server-side allowlist validation exists for allowed file types, or only client-side validation is present

You are affected if you run Hzmanyun Education And Training System version 3.1.1 AND the saveImage upload endpoint is exposed without proper authentication and file type validation.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

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.

dbcve · scoped
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Implement strict file type validation (allowlist approach), rename uploaded files, store uploads outside web root, add authentication requirements to the upload endpoint, and consider implementing file content scanning.

Recommended fix Low confidence
  1. This vulnerability has no publicly available patch or fix at the time of disclosure. The vendor (hzmanyun) was contacted but did not respond.
  2. Implement web application firewall (WAF) rules to restrict file upload endpoints and block executable file types (.php, .asp, .jsp, .exe, .sh, .bat, etc.)
  3. If possible, disable or restrict access to the saveImage function entirely until a fix is available
  4. Implement strict file type validation on the server side (not just client-side checks)
  5. Store uploaded files outside web-accessible directories and serve them through a download script with proper Content-Type headers
  6. Audit the application for additional access control vulnerabilities (CWE-284)
  7. Consider migrating to an alternative education and training platform with active security support
Caveat No upgrade path available - vendor did not respond to disclosure

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Education And Training System Scoped from the published advisory
  • Consultation6.0 h
  • Implementation12.0 h
  • Testing6.0 h
  • Review / QA4.0 h
28.0 hours of engineering $4,980
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2025-1555 in production — separate from our analysis above.

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What this is

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What belongs here
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  • Version or environment caveats, and links to real fixes
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