CVE intelligence and bounded remediation

CVE-2021-27418 — GE UR firmware versions prior to version 8.1x supports web interface with read-only access

Medium CVSS 6.1

GE UR firmware versions prior to version 8.1x supports web interface with read-only access. The device fails to properly validate user input, making it possible to perform cross-site scripting attacks, which may be used to send a malicious script. Also, UR Firmware web server does not perform HTML encoding of user-supplied strings.

Severity
Medium
CVSS
6.1 (3.1)
Published
2022-03-23
CISA KEV
Not currently listed
Ecosystem
operating-system
Weaknesses
CWE-20, CWE-79

Affected products

  • ge / multilin_b30_firmware
  • ge / multilin_b90_firmware
  • ge / multilin_c60_firmware
  • ge / multilin_c70_firmware
  • ge / multilin_c95_firmware
  • ge / multilin_d30_firmware

Showing 6 representative product identities from 19 source matches. Confirm exact affected versions with the linked vendor and NVD evidence.

Matched remediation archetype

Cross-site scripting and unsafe browser output

This catalog composition supplies bounded fallback guidance. Explicitly reviewed curated workflows load with the complete record below.

Check exposure

  • Trace reflected, stored, and DOM-derived untrusted values into HTML, attributes, URLs, styles, scripts, and client-side template sinks.
  • Identify affected origins, authenticated user roles, sensitive browser capabilities, and where content is shared across tenants.
  • Review framework escaping, rich-text sanitization, legacy templates, and client-side rendering paths.

Remediate safely

  • Use context-aware framework output encoding and safe DOM APIs; keep untrusted data out of executable contexts.
  • Sanitize intentionally supported markup with a maintained allowlist policy and validate URLs and attributes separately.
  • Update affected rendering components and add tests for every output context using inert sentinel markup.

Authoritative sources

Complete CVE record and remediation plan

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