CVE-2026-65693: high-severity vulnerability in microweber
Microweber CMS 2.0.20 Server-Side Template Injection via Mail Templates
Published · Updated
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
41Vexday Risk Score
No sign of exploitation. It has a public proof of concept.
ssvc Attendcvss 8.6epss 0.9%
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:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Affected products
microweber · microweberpublic PoCs found — 1
cve_referencegist.github.com/W40X/584f4b088d310bc5280cc74bbf97831aunverified⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
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