What’s Vulnerable › Vulnerabilities

CVE-2020-10633

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-04-08 · updated 2026-06-17
• Weakness: CWE-79

Description

A non-persistent XSS (cross-site scripting) vulnerability exists in eWON Flexy and Cosy (all firmware versions prior to 14.1s0). An attacker could send a specially crafted URL to initiate a password change for the device. The target must introduce the credentials to the gateway before the attack can be successful.

Affected products

• Hms-Networks Ewon Cosy Firmware: before 14.1s0 — fixed in 14.1s0
• Hms-Networks Ewon Flexy Firmware: before 14.1s0 — fixed in 14.1s0

How to fix

Upgrade to a fixed version: Hms-Networks Ewon Cosy Firmware 14.1s0; Hms-Networks Ewon Flexy Firmware 14.1s0. Check the vendor advisory for mitigations.

References

• https://www.us-cert.gov/ics/advisories/icsa-20-098-03
• https://www.us-cert.gov/ics/advisories/icsa-20-098-03

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