HTML Injection Vulnerability in Heatmiser Netmonitor by Heatmiser
CVE-2019-25323

5.1MEDIUM

Key Information:

Vendor

Heatmiser

Status
Heatmiser Netmonitor
Vendor
CVE Published:
12 February 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2019-25323?

Heatmiser Netmonitor version 3.03 is susceptible to an HTML injection vulnerability found in the outputSetup.htm page. This flaw permits attackers to inject malicious HTML via the outputtitle parameter, leveraging specially crafted POST requests. If exploited, this vulnerability can manipulate the displayed content of the web interface, creating potential risks for users and system integrity.

Affected Version(s)

Heatmiser Netmonitor 3.03

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2019-25323 - Proof of Concept

References

https://www.exploit-db.com/exploits/47828
exploit
https://web.archive.org/web/20190724160628/https://www.he...
product
https://www.zoneregeling.nl/heatmiser/netmonitor-handleid...
product

CVSS V4

Score:
5.1
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Ismail Tasdelen
.