CVE-2022-35739

Severity: medium (CVSS 5.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.9% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2022-10-25 · updated 2026-06-17
Weakness: CWE-79

Description

PRTG Network Monitor through 22.2.77.2204 does not prevent custom input for a device’s icon, which can be modified to insert arbitrary content into the style tag for that device. When the device page loads, the arbitrary Cascading Style Sheets (CSS) data is inserted into the style tag, loading malicious content. Due to PRTG Network Monitor preventing “characters, and from modern browsers disabling JavaScript support in style tags, this vulnerability could not be escalated into a Cross-Site Scripting vulnerability.

Affected products

Paessler PRTG: before 22.3.79.2108 — fixed in 22.3.79.2108

How to fix

Upgrade to a fixed version: Paessler PRTG 22.3.79.2108. Check the vendor advisory for mitigations.

References

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