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Description

The SPIP referer_spam plugin versions prior to 1.3.0 contain an unauthenticated SQL injection vulnerability in the referer_spam_ajouter and referer_spam_supprimer action handlers. The handlers read the url parameter from a GET request and interpolate it directly into SQL LIKE clauses without input validation or parameterization. The endpoints do not enforce authorization checks and do not use SPIP action protections such as securiser_action(), allowing remote attackers to execute arbitrary SQL queries.

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-89 Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')

Product status

Default status
unaffected

Any version before 1.3.0
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/referer_spam.html product

git.spip.net/...mit/33682df73cd5f7e9c72d8c4d5088611fa2441683 patch

www.vulncheck.com/...erer-spam-unauthenticated-sql-injection third-party-advisory

cve.org (CVE-2026-27743)

nvd.nist.gov (CVE-2026-27743)

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