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.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
High
Complete denial of service
CVSS Vector v4.0
Weakness Type (CWE)
References 4
https://chocapikk.com/posts/2026/spip-plugins-vulnerabilities/
disclosure@vulncheck.com
https://git.spip.net/spip-contrib-extensions/referer_spam/-/commit/33682df73cd5…
disclosure@vulncheck.com
https://plugins.spip.net/referer_spam.html
disclosure@vulncheck.com
https://www.vulncheck.com/advisories/spip-referer-spam-unauthenticated-sql-inje…
disclosure@vulncheck.com