SQL Injection in Spip Referer Spam
CVE-2026-27743
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.
Vulnerability class: SQL Injection
EPSS: 0.006 (44.9th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Spip Referer_spam — versions 0
Weakness classification (CWE)
References
- disclosure@vulncheck.com (Exploit, technical-description, Third Party Advisory, exploit)
- disclosure@vulncheck.com (vendor-advisory, Release Notes)
- disclosure@vulncheck.com (Product, product)
- disclosure@vulncheck.com (Patch, patch)
- disclosure@vulncheck.com (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2026-27743?
- CVE-2026-27743 is a critical-severity vulnerability in Spip Referer Spam, classified under SQL Injection. CVSS score: 9.8/10. Published 2026-02-25.
- How severe is CVE-2026-27743?
- Critical severity. CVSS v3 base score is 9.8 out of 10.