---
id: "CVE-2026-116885"
kind: "vulnerability"
aliases: ["CVE-2026-116885"]
title: "Semantic MediaWiki: reflected XSS in Special:SMWAdmin ID lookup"
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: ["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-2026-116885", "first_seen_at": "2026-10-27T11:31:27+00:00"}]
---

# Semantic MediaWiki: reflected XSS in Special:SMWAdmin ID lookup

Semantic MediaWiki's Special:SMWAdmin ID lookup echoes the unescaped id parameter back into the page, so a crafted link injects script. An attacker who lures a logged-in smw-admin into opening it can run script in that session and perform privileged actions as that administrator.

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

## How to check

- Check the installed Semantic MediaWiki version in Special:Version or `composer show mediawiki/semantic-media-wiki` and compare it against the fixed release
- Confirm whether the wiki has the Special:SMWAdmin page reachable by users in the smw-admin group

## Fix

- Upgrade Semantic MediaWiki to `7.3.1` or later
- Until upgraded, restrict access to Special:SMWAdmin and avoid having administrators click unknown links while logged in

## Timeline

- 2026-10-27T11:31:27+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-116885

## From the sources

Semantic MediaWiki from 3.1.0 before 7.3.1 contains a reflected cross-site scripting vulnerability in the Special:SMWAdmin ID lookup that allows unauthenticated attackers to inject markup through the unescaped id parameter. Attackers can lure an smw-admin administrator into opening a crafted lookup link, bypassing the auto-satisfied edit-token check, to execute script and perform privileged actions in the administrator's session.

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_