CVE intelligence and bounded remediation

CVE-2021-25647 — Testes-Codigo Testes De Codigo security vulnerability

Medium CVSS 5.4

Mobile application "Testes de Codigo" v11.3 and prior allows stored XSS by injecting a payload in the "feedback" message field causing it to be stored in the remote database and leading to its execution on client devices when loading the "feedback list", either by accessing the website directly or using the mobile application.

Severity
Medium
CVSS
5.4 (3.1)
Published
2021-01-28
CISA KEV
Not currently listed
Ecosystem
software/application
Weaknesses
CWE-79

Affected products

  • testes-codigo / testes_de_codigo

Matched remediation archetype

Cross-site scripting and unsafe browser output

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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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