CVE intelligence and bounded remediation

CVE-2025-71241 — SPIP before 4.3.6, 4.2.17, and 4.1.20 allows Cross-Site Scripting (XSS) in the private area

Medium CVSS 6.1

SPIP before 4.3.6, 4.2.17, and 4.1.20 allows Cross-Site Scripting (XSS) in the private area. The content of the error message displayed by the 'transmettre' API is not properly sanitized, allowing an attacker to inject malicious scripts. This vulnerability is mitigated by the SPIP security screen.

Severity
Medium
CVSS
6.1 (3.1)
Published
2026-02-19
CISA KEV
Not currently listed
Ecosystem
software/application
Weaknesses
CWE-79

Affected products

  • spip / spip

Showing 1 representative product identities from 3 source matches. Confirm exact affected versions with the linked vendor and NVD evidence.

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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