---
id: "CVE-2026-116884"
kind: "vulnerability"
aliases: ["CVE-2026-116884"]
title: "SemanticMediaWiki: stored XSS via tooltip data attributes runs script on hover"
severity: "medium"
cvss: 6.1
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["mediawiki", "package", "self-hosted", "semantic-mediawiki"]
not_affected_if: ["trusted-editors-only", "version-7.3.1-or-later"]
published_at: "2026-10-27T11:17:30+00:00"
first_seen_at: "2026-10-27T11:31:27+00:00"
updated_at: "2026-10-27T11:32:02+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-116884", "first_seen_at": "2026-10-27T11:31:27+00:00"}]
---

# SemanticMediaWiki: stored XSS via tooltip data attributes runs script on hover

SemanticMediaWiki 5.0.0 through 7.3.0 renders tooltip data-* attributes as raw HTML in ext.smw.tooltip.tippy.js. An editor who plants a crafted .smw-highlighter span can run JavaScript in the browser of any viewer who hovers it, including administrators.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Look at the installed SemanticMediaWiki version in Special:Version on the wiki, or in the extension's composer.json or extension.json.
- Confirm whether the wiki allows untrusted users to edit pages, since the attacker must be an editor.

## Fix

- Upgrade SemanticMediaWiki to `7.3.1` or later.
- Until upgraded, restrict editing rights to trusted users.

## Timeline

- 2026-10-27T11:31:27+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-116884

## From the sources

SemanticMediaWiki from 5.0.0 before 7.3.1 contains a stored cross-site scripting vulnerability in ext.smw.tooltip.tippy.js that renders data-* attributes via innerHTML with allowHTML enabled. Editors can plant a .smw-highlighter span with a malicious data-content, data-title, data-top, data-bottom, or data-theme attribute to execute JavaScript when viewers, including administrators, hover it.

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