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Description

The SPIP tickets plugin versions prior to 4.3.3 contain an unauthenticated remote code execution vulnerability in the forum preview handling for public ticket pages. The plugin appends untrusted request parameters into HTML that is later rendered by a template using unfiltered environment rendering (#ENV**), which disables SPIP output filtering. As a result, an unauthenticated attacker can inject crafted content that is evaluated through SPIP's template processing chain, leading to execution of code in the context of the web server.

PUBLISHED Reserved 2026-02-23 | Published 2026-02-25 | Updated 2026-02-26 | Assigner VulnCheck




CRITICAL: 9.3CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CRITICAL: 9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Problem types

CWE-94 Improper Control of Generation of Code ('Code Injection')

Product status

Default status
unaffected

Any version before 4.3.3
affected

Credits

Valentin Lobstein (Chocapikk) finder

VulnCheck coordinator

References

chocapikk.com/posts/2026/spip-plugins-vulnerabilities/ technical-description exploit

blog.spip.net/...jour-de-securite-sortie-de-SPIP-4-4-10.html vendor-advisory

plugins.spip.net/tickets product

git.spip.net/...mit/869935b6687822ed79ad5477626a664d8ea6dcf7 patch

www.vulncheck.com/...sories/spip-tickets-unauthenticated-rce third-party-advisory

cve.org (CVE-2026-27744)

nvd.nist.gov (CVE-2026-27744)

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