CVE intelligence and bounded remediation

CVE-2022-48311 — Hp Deskjet 2540 A9U23B Firmware security vulnerability

Critical CVSS 9

**UNSUPPORTED WHEN ASSIGNED** Cross Site Scripting (XSS) in HP Deskjet 2540 series printer Firmware Version CEP1FN1418BR and Product Model Number A9U23B allows authenticated attacker to inject their own script into the page via HTTP configuration page. NOTE: This vulnerability only affects products that are no longer supported by the maintainer.

Severity
Critical
CVSS
9 (3.1)
Published
2023-02-06
CISA KEV
Not currently listed
Ecosystem
operating-system
Weaknesses
CWE-79

Affected products

  • hp / deskjet_2540_a9u23b_firmware / cep1fn1418br

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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