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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.
Use CWE-79, Paessler vendor hub and Prtg Network Monitor product page to widen CVE-2022-35739 into its surrounding weakness, vendor, and product context.
Compare it with CVE-2023-31452, CVE-2023-32782 and CVE-2023-32781 for nearby disclosures in the same product family. Additional editorial context is available in Why “Low” and “Medium” CVEs Still Breach Networks.