Cyber Posture

CVE-2026-21450

Critical

Published: 02 January 2026

Published
02 January 2026
Modified
08 January 2026
KEV Added
—
Patch
—
CVSS Score 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS Score 0.0084 74.8th percentile
Risk Priority 20 60% EPSS · 20% KEV · 20% CVSS

Description

Bagisto is an open source laravel eCommerce platform. Versions prior to 2.3.10 are vulnerable to server-side template injection via type parameter, which can lead to remote code execution or another exploitation. Version 2.3.10 fixes the issue.

Mitigating Controls (NIST 800-53 r5)AI

SI-2 Flaw Remediation good match
prevent

Mandates timely remediation of the server-side template injection flaw in Bagisto by patching to version 2.3.10, directly eliminating the vulnerability.

SI-10 Information Input Validation good match
prevent

Requires validation of untrusted inputs like the 'type' parameter to block malicious template code that leads to remote code execution.

RA-5 Vulnerability Monitoring and Scanning partial match
preventdetect

Enables vulnerability scanning to identify the SSTI in the type parameter, supporting prioritization and patching of this critical issue.

Security SummaryAI

CVE-2026-21450 is a server-side template injection vulnerability (CWE-1336) affecting Bagisto, an open source Laravel-based eCommerce platform. Versions prior to 2.3.10 are vulnerable through the "type" parameter, which enables attackers to inject malicious templates. The issue carries a CVSS v3.1 base score of 9.8 (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H), indicating critical severity due to its potential for high-impact exploitation.

The vulnerability can be exploited remotely over the network by unauthenticated attackers with low complexity and no user interaction required. Successful exploitation leads to remote code execution or other severe outcomes, such as full compromise of the affected server, granting high confidentiality, integrity, and availability impacts.

The official GitHub security advisory (GHSA-9hvg-qw5q-wqwp) confirms that upgrading to Bagisto version 2.3.10 resolves the issue by addressing the template injection flaw in the type parameter handling. Security practitioners should prioritize patching affected instances to mitigate risks.

Details

CWE(s)
CWE-1336

Affected Products

webkul
bagisto
≤ 2.3.10

MITRE ATT&CK Enterprise TechniquesAI

T1190 Exploit Public-Facing Application Initial Access
Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.
attack.mitre.org →
T1221 Template Injection Stealth
Adversaries may create or modify references in user document templates to conceal malicious code or force authentication attempts.
attack.mitre.org →
Why these techniques?

CVE-2026-21450 is a server-side template injection (SSTI) vulnerability in a public-facing eCommerce application, enabling unauthenticated remote code execution via the 'type' parameter, directly mapping to T1190 (Exploit Public-Facing Application) and T1221 (Template Injection).

Confidence: HIGH · MITRE ATT&CK Enterprise v19.0

References