CVE-2026-65693

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.

CVSS v3 7.2 HIGH

7.2^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.2 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required HIGH

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://gist.github.com/W40X/584f4b088d310bc5280cc74bbf97831a
https://www.vulncheck.com/advisories/microweber-cms-server-side-template-injection-via-mail-templates

Configurations

No configuration.

History

24 Jul 2026, 16:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-07-24 16:16

Updated : 2026-07-28 20:37

NVD link : CVE-2026-65693

Mitre link : CVE-2026-65693

CVE.ORG link : CVE-2026-65693

JSON object : View

Products Affected

No product.

CWE

CWE-94

Improper Control of Generation of Code ('Code Injection')

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