CVE intelligence and bounded remediation

CVE-2023-0840 — A vulnerability classified as problematic was found in PHPCrazy 1.1.1

Medium CVSS 5.4

A vulnerability classified as problematic was found in PHPCrazy 1.1.1. This vulnerability affects unknown code of the file admin/admin.php?action=users&mode=info&user=2. The manipulation of the argument username leads to cross site scripting. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used. VDB-221086 is the identifier assigned to this vulnerability.

Severity
Medium
CVSS
5.4 (3.1)
Published
2023-02-15
CISA KEV
Not currently listed
Ecosystem
software/application
Weaknesses
CWE-79

Affected products

  • phpcrazy_project / phpcrazy / 1.1.1

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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