PT-2026-64371 · Microweber · Microweber

Reju Kole · CVE-2026-65693 · Published 2026-07-24 · Updated 2026-07-24

Mitre

CVSS v3.1

7.2

High

Base vector

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

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.

Exploit

Fix

Code Injection

Weakness Enumeration

CWE-94

Related Identifiers

CVE-2026-65693

Affected Products

Microweber

References · 3

• 🔥 https://gist.github.com/W40X/584f4b088d310bc5280cc74bbf97831a · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2026-65693 · Security Note
• https://vulncheck.com/advisories/microweber-cms-server-side-template-injection-via-mail-templates · Note