CVE-2025-1676 is a medium severity OS command injection flaw in hzmanyun Education and Training System 3.1.1, scored 6.3. Attacker supplied input reaches a system command. No fixed version is named, so check the vendor and limit exposure. The record says exploit details are public, and it is not on the CISA KEV list.
What's affected
The CVE record lists hzmanyun Education and Training System 3.1.1. The weakness sits in the pdf2swf function behind /pdf2swf, through the file input.
- Product: hzmanyun Education and Training System
- Affected: 3.1.1
- Fixed: not named in the CVE record
- Severity: Medium, CVSS 6.3 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L)
- Known exploited (CISA KEV): no, the record's kev flag is false
The CVE record does not name a fixed version. The vendor advisory, if one exists, should be checked before you rely on any version number.
The record also says the exploit has been disclosed to the public and may be used. That is a statement about public technical details, not a statement that attacks are underway. KEV status is false, and nothing in the record claims in the wild exploitation.
How to check if you're exposed
This is a web application, so exposure depends on how it was deployed. Start with these steps.
- Find out whether the product runs anywhere in your estate, including test and demo hosts. Search deployment manifests and server inventories for the product name.
- Read the installed version from the application's about page, build file or release archive and compare it with 3.1.1.
- Check whether the path in the record is reachable from the internet or only from an internal network. A reverse proxy log search for that path shows who has been calling it.
- If you hold the source, search it for the file input and read how it is handled before it reaches a system command, for example
grep -rn "file" .from the project root.
If you cannot read the source, treat any reachable instance as exposed until the vendor says otherwise.
What to do now
- Inventory every hzmanyun Education and Training System you run and note the version.
- Remove management access from the internet. Turn off remote administration and delete port forwards that point at the admin interface.
- Limit the admin interface to a trusted management network or VPN, and use a strong unique admin password.
- Watch the vendor support page for firmware or a patch. The record names no fixed version, so check the advisory before assuming one exists.
- If the device cannot be isolated and no fix appears, plan its replacement. Unsupported network gear is a standing risk.
- Review gateway logs for requests to the affected path and for odd outbound connections from the device.
Why it matters
The weakness is command injection. The application builds a command for the operating system and includes a value the user controls, here file, without neutralising characters that the shell treats as special. The command then does more than its author intended.
Impact depends on where the code runs. On a router or similar device the process often has wide rights, so a successful abuse can change settings, read stored credentials or pivot to other hosts. The record scores confidentiality, integrity and availability impact as low each, and says the attack needs a low privileged account (PR:L in the vector). Treat the score as a floor for the planning of exposed gear, not a ceiling.
The record maps this to CWE-77 (Improper Neutralization of Special Elements used in a Command), CWE-78 (OS Command Injection).
Quick check
Is CVE-2025-1676 exploited in the wild?
The record's CISA KEV flag is false, and nothing in the record says attacks are underway. It does say the exploit has been disclosed to the public, so assume the technical details are available.
Is there a patch for hzmanyun Education and Training System?
The CVE record names no fixed version. Check the vendor support page and advisory, and reduce exposure of the management interface in the meantime.
Sources
- Safeguard Gold entry for CVE-2025-1676
- CVE record data as supplied for this review (NVD description, CVSS vector, CWE list). The references below are listed in the record and were not all fetched for this page, so confirm details against the vendor before acting.
- https://github.com/Rain1er/report/blob/main/nxb/rce1.md
- https://vuldb.com/?ctiid.296731
- https://vuldb.com/?id.296731
- https://vuldb.com/?submit.500507
Last reviewed: 19 October 2026.
