CVE-2025-65212
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 · uneditedAn issue was discovered in NJHYST HY511 POE core before 2.1 and plugins before 0.1. The vulnerability stems from the device's insufficient cookie verification, allowing an attacker to directly request the configuration file address and download the core configuration file without logging into the device management backend. By reading the corresponding username and self-decrypted MD5 password in the core configuration file, the attacker can directly log in to the backend, thereby bypassing the front-end backend login page.
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 · high confidenceNJHYST HY511 POE devices before core 2.1 and plugins 0.1 contain an authentication bypass vulnerability. The device fails to properly verify session cookies, allowing unauthenticated attackers to directly request and download the core configuration file. This configuration file contains plaintext-equivalent credentials (username and self-decrypted MD5 password), enabling attackers to gain full administrative access to the device management backend.
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< 2.1CVSS 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 checksWork through these to decide whether this CVE applies to you.
-
Identify the device model and firmware versionAccess the web interface of the NJHYST HY511 POE core and locate the firmware version information, typically found in System Settings, Status, or About pages. Alternatively, check the startup banner or admin panel for the exact version number.Affected if The firmware version is displayed as anything below 2.1 (for example, 2.0, 1.x, or any version number less than 2.1)
-
Locate the configuration file endpointInspect the web application for links or references to configuration file downloads. Common paths include /config.bin, /backup, /cfg, /export, or similar terms. Check JavaScript files or network traffic for any hardcoded URLs pointing to configuration exports.Affected if A configuration file download URL exists and is accessible without requiring authentication (no login session or cookie required)
-
Test unauthenticated config file accessAttempt to directly request the discovered configuration file URL path in a browser or via curl/wget without providing any authentication cookies or credentials.Affected if The configuration file downloads successfully without any login or session validation
-
Inspect the configuration file contentsOpen the downloaded configuration file and search for username entries and password strings. Look for plaintext credentials or MD5 hash patterns that may represent decrypted passwords.Affected if The file contains plaintext usernames and/or MD5 password hashes that can be used to authenticate to the device
You are affected if the NJHYST HY511 POE core firmware version is below 2.1 AND the configuration file can be downloaded without authentication, as this allows credential harvest and full login bypass.
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.
dbcve · scoped2.1
Upgrade the HY511 POE core to version 2.1 or later and plugins to 0.1 or later. If patching is not immediately possible, restrict network access to the device management interface to trusted IPs only.
Hy511 Firmware version 2.1 (core) and plugins version 0.1
- Obtain the fixed Hy511 firmware version 2.1 (or later) and plugins version 0.1 (or later) from the official vendor (NJHYST)
- Access the device management interface through a trusted network connection
- Navigate to the firmware/software update section in the device admin panel
- Upload and install the fixed firmware version 2.1 for the core component
- Upload and install the fixed plugins version 0.1 or later
- Reboot the device as prompted to apply the updates
- After reboot, verify the firmware version has been updated successfully
- Change the administrative password as a precautionary measure since credentials may have been exposed
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation8.0 h
- Implementation16.0 h
- Testing8.0 h
- Review / QA4.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $10,240.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2025-65212 — 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-2025-65212 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
No notes yet
Be the first to add a field note for this CVE — a mitigation you’ve verified, a version caveat, or a link to a working fix. Sign in above to contribute.
A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.
- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
- No spam, self-promotion, credentials, or personal data