CVE-2026-65693 | Microweber CMS through 2.0.20 contains a server-side templat… | CVSS 7.2 HIGH

Description

Microweber CMS through 2.0.20 contains a server-side template injection vulnerability that allows authenticated administrators to achieve arbitrary OS command execution by injecting Twig expressions into mail templates. Attackers can exploit the unsandboxed Twig environment in TwigView::render(), which lacks SandboxExtension or a SecurityPolicy, to inject malicious expressions such as filter('system') into mail template bodies stored unsanitized in the database, causing automatic payload execution on each subsequent application event that triggers a mail dispatch.

Metadata

CVE ID: CVE-2026-65693
State: PUBLISHED
Assigner: VulnCheck
Reserved: 2026-07-22 20:26 UTC
Published: 2026-07-24 15:33 UTC
Last updated: 2026-07-24 15:33 UTC
Primary CWE: CWE-94
Improper Control of Generation of Code ('Code Injection')
Vendor / Product: microweber / microweber
Sources: cve.org · NVD

Severity & Metrics

7.2 HIGH CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Affected products (1)

Vendor	Product	Platform	Versions
microweber	microweber	—	0 ≤ 2.0.20

Weakness (CWE)

CWE	Source	Description
CWE-94	cna	Improper Control of Generation of Code ('Code Injection')

CVSS scores (2)

Score	Severity	Version	Source	Vector
8.6	HIGH	4.0	cna	CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
7.2	HIGH	3.1	cna	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

References (2)