PHP2Shell : See if you’re affected with a free external attack surface scan. Click Here > 

Back
New CVE Detected

CVE-2023-45858 – Unauthenticated Directory Traversal (Local File Disclosure) – PRTG Network Monitor

Be the first to know when new zero-days emerge:

Subscribe to Email Alerts
Subscribe to RSS Feed

Summary

CVE-2023-45858 is a directory traversal vulnerability (CWE-23) in the PRTG Network Monitor webserver that allows an unauthenticated remote attacker to read arbitrary local files on the host. It affects Paessler PRTG Network Monitor before version 23.4.88.1429 and carries a CVSS v3.1 base score of 8.6 (High).

Technical details

  • Root cause: Insufficient sanitization of path input in the PRTG webserver component, allowing relative path (directory traversal) sequences to escape the intended file/directory scope.
  • Trigger conditions: An attacker sends a specially crafted HTTP request containing path traversal sequences to the exposed PRTG web interface; no authentication or user interaction is required to trigger the flaw.
  • Attack vector: Network — exploitable remotely over HTTP/HTTPS against the PRTG webserver.
  • Impact: Disclosure of local files on the underlying server (confidentiality impact rated High), with no reported impact to integrity or availability. Exposed files could include configuration data or other sensitive information that aids further compromise.

Affected software

  • Paessler PRTG Network Monitor, all versions before 23.4.88.1429

Severity

  • CVSS v3.1 Base Score: 8.6 (High)
  • Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N

Mitigation and recommended actions

  • Immediate: Upgrade Paessler PRTG Network Monitor to version 23.4.88.1429 or later, where the path traversal issue has been fixed.
  • If immediate patching is not possible: Restrict network access to the PRTG web interface (e.g., limit exposure to trusted internal networks or VPN, and avoid exposing the PRTG webserver directly to the internet) until the update can be applied, and monitor web server logs for suspicious requests containing path traversal sequences.

References

Are you exposed?

Get a free report of your organization’s exposure to this CVE and threat

  • Mapping of all Assets with this Technology
  • Identification of potentially exposed assets to this CVE
  • Confirmation of verified exploitable assets
Get Exposure Report

How IONIX’s External Exposure Management Platform Detects and Validates
Zero-Days to Shrink MTTR

1

Map your entire attack surface (continously)

IONIX uses multi-factor discovery methods, including DNS analysis, certificate mapping, metadata inspection, and more, to automatically map every internet-facing asset across your environment. This includes cloud instances, third-party platforms, shadow IT, and even forgotten infrastructure that traditional tools miss.

2

Monitor for new CVEs

Dozens of threat intel feeds using agentic technology are continuously analyzed to detect the appearance of proof-of-concept code, exploit kits, and indicators of active targeting. IONIX goes further by applying AI to proactively evaluate whether emerging vulnerabilities are likely to be exploited, even before PoCs go public.

3

Identify Potential External Exposures

Not all CVEs matter. IONIX filters vulnerabilities by asking attacker-centric questions: Can it be reached from the internet? Does it require authentication? Is it being exploited in the wild? This dramatically reduces noise and focuses teams on threats that can actually be weaponized.

4

Create Safe, Scalable Exploit Validations

IONIX transforms real-world PoCs into safe, non-intrusive test payloads that can be run in production environments without disruption. These simulations are precisely targeted to the systems that are vulnerable, ensuring rapid validation without unnecessary load.

5

Execute Exploit Validations

By combining context about software stack, versioning, exposure status, and reachability, IONIX ensures that only the right payloads are executed against the right assets, maximizing efficiency and minimizing risk.

6

Drive Fast and Actionable Remediation

Results are routed through integrations with ticketing, SOAR, and SIEM tools. Issues are written in plain language, bundled into remediation clusters, and prioritized based on asset criticality, exploitability, and blast radius. This shortens mean time to remediation (MTTR) and empowers teams to act with confidence.

Are you exposed?

Get a free report of your organization’s exposure to this CVE and threat

  • Mapping of all Assets with this Technology
  • Identification of potentially exposed assets to this CVE
  • Confirmation of verified exploitable assets
Get Exposure Report
Close

Subscribe to Threat Center RSS

Copy/paste the link below into your preferred RSS reader or follow these instructions to subscribe to Slack alerts.

Open RSS feedSlack setup instructions

Close

Get Real-Time CVE Alerts to Your Email

Be the first to know when new zero-days emerge