CVE-2026-65693
highpriority · track · 0EPSS 0.009 · 60 %ileEUEPSS · scored 2026-10-28
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
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.1–8.6
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (1)
Products and version ranges known to be affected.
also known as (3)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (7)
External citations — patches, advisories, analysis.
- https://gist.github.com/W40X/584f4b088d310bc5280cc74bbf97831acnnvd
- https://github.com/microweber/microweber/releasesPatchcnnvd
- https://www.vulncheck.com/advisories/microweber-cms-server-side-template-injection-via-mail-templatescnnvd
- https://gist.github.com/W40X/584f4b088d310bc5280cc74bbf97831aenisa_euvd
- https://www.vulncheck.com/advisories/microweber-cms-server-side-template-injection-via-mail-templatesenisa_euvd
- https://gist.github.com/W40X/584f4b088d310bc5280cc74bbf97831anvd
- https://www.vulncheck.com/advisories/microweber-cms-server-side-template-injection-via-mail-templatesnvd
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