CVE intelligence and bounded remediation

CVE-2021-40909 — Php Crud Without Refresh/Reload Using Ajax And Datatables Tutorial Proj… security vulnerability

Critical CVSS 9.6

Cross site scripting (XSS) vulnerability in sourcecodester PHP CRUD without Refresh/Reload using Ajax and DataTables Tutorial v1 by oretnom23, allows remote attackers to execute arbitrary code via the first_name, last_name, and email parameters to /ajax_crud.

Severity
Critical
CVSS
9.6 (3.1)
Published
2022-01-24
CISA KEV
Not currently listed
Ecosystem
software/application
Weaknesses
CWE-79, CWE-89

Affected products

  • php_crud_without_refresh/reload_using_ajax_and_datatables_tutorial_project / php_crud_without_refresh/reload_using_ajax_and_datatables_tutorial / 1.0

Matched remediation archetype

SQL and data-query injection

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Check exposure

  • Trace request, message, file, and stored values into SQL, ORM query fragments, filters, sort expressions, and other data-query languages.
  • Inventory database roles, reachable schemas, multi-tenant boundaries, and whether stacked or administrative operations are enabled.
  • Check both direct queries and second-order use of previously stored values.

Remediate safely

  • Use parameterized queries or safe query builders for all values; map identifiers and operators through explicit allowlists.
  • Remove raw query concatenation and give the application account only the tables and operations it requires.
  • Update affected data-access components and add regression tests for query structure preservation with inert edge-case inputs.

Authoritative sources

Complete CVE record and remediation plan

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