What’s Vulnerable › Vulnerabilities

CVE-2026-27743: SPIP referer_spam < 1.3.0 Unauthenticated SQL Injection

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-02-25 · updated 2026-06-17
• Weakness: CWE-89

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.

Affected products

• SPIP referer_spam: before 1.3.0 — fixed in 1.3.0

How to fix

Upgrade to a fixed version: SPIP referer_spam 1.3.0. Check the vendor advisory for mitigations.

References

• https://blog.spip.net/Mise-a-jour-de-securite-sortie-de-SPIP-4-4-10.html
• https://chocapikk.com/posts/2026/spip-plugins-vulnerabilities/
• https://git.spip.net/spip-contrib-extensions/referer_spam/-/commit/33682df73cd5f7e9c72d8c4d5088611fa2441683
• https://plugins.spip.net/referer_spam.html
• https://www.vulncheck.com/advisories/spip-referer-spam-unauthenticated-sql-injection

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