SPIP 4.0.0 is affected by a remote command execution vulnerability. To exploit the vulnerability, an attacker must craft a malicious picture with a double extension, upload it and then click on it to execute it.

References

• https://nvd.nist.gov/vuln/detail/CVE-2021-44123
• https://git.spip.net/spip/spip/commit/1cf91def15966406ddd0488cf9d1ecd1ae82d47a