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
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.007 (52.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 53rd percentile — 52.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.007 · change: +0.001
Affected products
- Spip Referer Spam — versions 0
Weakness classification (CWE)
References
- chocapikk.com/posts/2026/spip-plugins-vulnerabilities/ (Exploit, technical-description, Third Party Advisory, exploit)
- blog.spip.net/Mise-a-jour-de-securite-sortie-de-SPIP-4-4-10.html (vendor-advisory, Release Notes)
- plugins.spip.net/referer_spam.html (Product, product)
- git.spip.net/spip-contrib-extensions/referer_spam/-/commit/33682df73cd5f7e9c72d… (Patch, patch)
- www.vulncheck.com/advisories/spip-referer-spam-unauthenticated-sql-injection (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.