PT-2026-21858 · WordPress · Referer Spam

Valentin Lobstein + 1 · Published 2026-02-25 · Updated 2026-03-03 · CVE-2026-27743

Positive Technologies (AI Summary)

CVSS v3.1

9.8

Critical

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions SPIP referer spam plugin versions prior to 1.3.0

Description The referer spam plugin is susceptible to an unauthenticated SQL injection. This occurs because the plugin’s referer spam ajouter and referer spam supprimer action handlers directly incorporate the url parameter from GET requests into SQL LIKE clauses without proper validation or parameterization. These endpoints lack authorization checks and SPIP action protections. This allows remote attackers to execute arbitrary SQL queries.

Recommendations Update to referer spam plugin version 1.3.0 or later.

Exploit

Fix

SQL injection

Weakness Enumeration

CWE-89

Related Identifiers

CVE-2026-27743

Affected Products

Referer Spam

References · 14

• 🔥 https://chocapikk.com/posts/2026/spip-plugins-vulnerabilities · Exploit
• https://blog.spip.net/Mise-a-jour-de-securite-sortie-de-SPIP-4-4-10.html · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-27743 · Security Note
• https://git.spip.net/spip-contrib-extensions/referer_spam/-/commit/33682df73cd5f7e9c72d8c4d5088611fa2441683 · Patch
• https://osv.dev/vulnerability/CVE-2026-27743 · Vendor Advisory
• https://twitter.com/cracbot/status/2028425212367433893 · Twitter Post
• https://twitter.com/CVEnew/status/2026641356660035725 · Twitter Post
• https://t.me/CVEtracker/45684 · Telegram Post
• https://plugins.spip.net/referer_spam.html · Note
• https://vulncheck.com/advisories/spip-referer-spam-unauthenticated-sql-injection · Note
• https://twitter.com/offseq/status/2026605663380537562 · Twitter Post
• https://twitter.com/TheHackerWire/status/2026721934566895954 · Twitter Post
• https://twitter.com/VulmonFeeds/status/2026537821930983530 · Twitter Post
• https://t.me/cveNotify/154008 · Telegram Post