Is CVE-2026-116883 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-116883?

CVE-2026-116883 has a CVSS v3 severity of MEDIUM (4.8).

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CVE-2026-116883

Description

Semantic MediaWiki from 3.1.0 before 7.3.1 contains a stored cross-site scripting vulnerability that allows authenticated schema editors to inject HTML through schema descriptions. Attackers with the smw-schemaedit permission can save HTML that is passed unescaped to Html::rawElement() in HtmlBuilder, altering pages and targeting users who view the schema.