What is the CVSS score of CVE-2026-27743?

CVE-2026-27743 has a CVSS 3.1 base score of 9.8 (Critical). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.1%.

Which versions of Referer Spam are affected by CVE-2026-27743?

A critical unauthenticated SQL injection vulnerability exists in the SPIP referer_spam plugin that allows attackers to execute arbitrary database queries without authentication.. A patch is available.

Is there a public PoC exploit available for CVE-2026-27743?

Yes, a public proof-of-concept exploit is available for CVE-2026-27743. Prioritise patching immediately. EPSS: 0.1%.

How to fix or mitigate CVE-2026-27743?

Within 24 hours: Inventory all systems running SPIP with the referer_spam plugin and identify current versions; apply vendor patch 1.3.0 or disable the plugin if patching is not immediately possible. Within 7 days: Complete patching of all affected systems and verify patch application through version checks. Within 30 days: Conduct a security audit of affected databases to detect any unauthorized access or data manipulation that may have occurred prior to patching.

Referer Spam CVE-2026-27743

CRITICAL

SQL Injection (CWE-89)

2026-02-25 disclosure@vulncheck.com

SQLi Referer Spam Spip

9.8

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

9.8 CRITICAL

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 21:55 vuln.today

PoC Detected

Mar 03, 2026 - 19:11 vuln.today

Public exploit code

Patch released

Mar 03, 2026 - 19:11 nvd

Patch available

CVE Published

Feb 25, 2026 - 04:16 nvd

CRITICAL 9.8

DescriptionCVE.org

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.

AnalysisAI

Unauthenticated SQL injection in SPIP referer_spam plugin before 1.3.0 via the referrer tracking functionality. PoC and patch available.

Technical ContextAI

CWE-89 SQL injection through referrer tracking. The plugin logs referrer URLs without sanitization, enabling SQL injection through crafted Referer headers.