CVE-2026-27744

Received Received - Intake

Unauthenticated Remote Code Execution in SPIP Tickets Plugin

Publication date: 2026-02-25

Last updated on: 2026-02-27

Assigner: VulnCheck

Description

The SPIP tickets plugin versions prior to 4.3.3 contain an unauthenticated remote code execution vulnerability in the forum preview handling for public ticket pages. The plugin appends untrusted request parameters into HTML that is later rendered by a template using unfiltered environment rendering (#ENV**), which disables SPIP output filtering. As a result, an unauthenticated attacker can inject crafted content that is evaluated through SPIP's template processing chain, leading to execution of code in the context of the web server.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-02-25

Last Modified

2026-02-27

Generated

2026-07-06

AI Q&A

2026-02-25

EPSS Evaluated

2026-07-05

NVD

CVE-2026-27744

EUVD

EUVD-2026-8608

Affected Vendors & Products

Vendor	Product	Version / Range
spip	tickets	to 4.3.3 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-94	The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment.

Attack-Flow Graph

Executive Summary

[{'type': 'paragraph', 'content': 'CVE-2026-27744 is an unauthenticated remote code execution vulnerability in the SPIP tickets plugin versions prior to 4.3.3.'}, {'type': 'paragraph', 'content': 'The vulnerability occurs in the forum preview handling for public ticket pages, where untrusted request parameters are appended directly into HTML content.'}, {'type': 'paragraph', 'content': "This HTML content is then rendered by a SPIP template using unfiltered environment rendering (#ENV**), which disables SPIP's output filtering."}, {'type': 'paragraph', 'content': "As a result, an attacker without any authentication can inject crafted input that is processed through SPIP's template engine, leading to arbitrary code execution on the web server."}] [2]

Impact Analysis

This vulnerability allows an unauthenticated attacker to execute arbitrary code on the web server hosting the vulnerable SPIP tickets plugin.

The impact includes potential full compromise of the server, leading to unauthorized access, data theft, data manipulation, service disruption, or further attacks within the network.

The CVSS v4 base score of 9.3 indicates a critical severity with high impact on confidentiality, integrity, and availability.

Compliance Impact

I don't know

Detection Guidance

I don't know

Mitigation Strategies

To mitigate the vulnerability CVE-2026-27744, you should upgrade the SPIP tickets plugin to version 4.3.3 or later, where the issue has been fixed.

The fix involves sanitizing untrusted request parameters before they are injected into HTML content, preventing unauthenticated remote code execution.

Applying the patch or update that ensures proper validation and sanitization of user input is critical to prevent exploitation.

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