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ExploitedIn CISA KEVFix available

CVE-2018-19410

Exploitation confirmed. First attested on 2025-02-04 by CISA-ADP, CISA KEV, GCVE · kevintel, GCVE · shadowserver.

  • Published2018-11-21
  • Fixed in18.2.40.1683

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

PRTG Network Monitor before 18.2.40.1683 allows remote unauthenticated attackers to create users with read-write privileges (including administrator). A remote unauthenticated user can craft an HTTP request and override attributes of the 'include' directive in /public/login.htm and perform a Local File Inclusion attack, by including /api/addusers and executing it. By providing the 'id' and 'users' parameters, an unauthenticated attacker can create a user with read-write privileges (including administrator).

Timeline

dates in UTC
  1. 2018-11-2116:29CVE publishedNVD
  2. 2025-02-04Added to the CISA KEV catalogCISA KEV
  3. 2025-02-04Listed as exploited by GCVEGCVE
  4. 2025-02-04Exploitation first reportedCISA KEV
  5. 2025-02-0415:49SSVC exploitation set to activeCISA-ADP

Observed activity

isMalicious corpus · updated 2026-11-03 21:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2018-19410?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2018-19410?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD
Paessler prtg network monitor
BranchAffectedFixed in
18.2< 18.2.40.168318.2.40.1683

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Vendor advisories

  • CVE-2018-19410 Red Hat Product Security

    PRTG Network Monitor: Authentication Bypass, Improper Authorization and Local File Inclusion in PRTG Network Monitor

Full record on NVD

Fix

  1. Update Paessler prtg network monitor to 18.2.40.1683
  2. CISA’s required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.due 2025-02-25

Detection

read 2026-11-03 22:42 UTC
Nuclei template
available
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
1 repository, unverifiedhimash/CVE-2018-19410-POC
PoC-in-GitHub
Metasploit modules
none listed
Metasploit Framework

CISA Known Exploited Vulnerability

Date Added
2025-02-04
Patch Due Date
2025-02-25
Ransomware Use
Unknown
Required Action
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
2018-11-21
Last Modified
2026-06-17
NVD status
Analyzed
GitHub Advisory
GHSA-pm93-g4gf-j42f

Frequently asked questions

What is CVE-2018-19410?

PRTG Network Monitor before 18.2.40.1683 allows remote unauthenticated attackers to create users with read-write privileges (including administrator). A remote unauthenticated user can craft an HTTP request and override attributes of the 'include' directive in /public/login.htm and perform a Local File Inclusion attack, by including /api/addusers and executing it. By providing the 'id' and 'users' parameters, an unauthenticated attacker can create a user with read-write privileges (including administrator).

Is CVE-2018-19410 actively exploited?

Yes. CVE-2018-19410 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, meaning it has been confirmed as actively exploited in the wild. CISA requires federal agencies to patch by 2025-02-25.

What is the CVSS score for CVE-2018-19410?

CVE-2018-19410 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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Sources for this record