---
id: "CVE-2026-25784"
kind: "vulnerability"
aliases: ["CVE-2026-25784"]
title: "BlueSpice wiki container: default config lets anonymous users gain admin"
severity: "critical"
cvss: 9.8
epss: 0.00345
exploited: false
status: "open"
category: "other"
products: []
ecosystems: []
tags: ["bluespice", "docker", "mediawiki", "other", "self-hosted"]
not_affected_if: ["non-container-install", "outside-5.2.3-to-5.2.7-range"]
published_at: "2026-10-23T09:17:06+00:00"
first_seen_at: "2026-10-23T21:57:32+00:00"
updated_at: "2026-10-24T07:15:51+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-25784", "first_seen_at": "2026-10-23T21:57:32+00:00"}, {"source": "epss", "url": "https://api.first.org/data/v1/epss?cve=CVE-2026-25784", "first_seen_at": "2026-10-24T07:15:51+00:00"}]
---

# BlueSpice wiki container: default config lets anonymous users gain admin

The bluespice/wiki container ships an insecure default that disables an IP restriction on its internal token authenticator when WIKI_SERVICE_TOKEN_AUTH_ALLOWED is unset. Anyone who can read the wiki, including anonymous users on public wikis, can get an application token and a sysop session as the internal service user.

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

## How to check

Check whether WIKI_SERVICE_TOKEN_AUTH_ALLOWED is set in the running container's environment; the flaw applies when it is unset. Affected if running BlueSpice 5.2.3 before 5.2.7, or a 5.2.7 image published before 2026-10-19 15:37 UTC.

## Fix

Upgrade past BlueSpice 5.2.7 and pull a container image published after 2026-10-19 15:37 UTC. The sources do not name a fixed version beyond that or the value to set for WIKI_SERVICE_TOKEN_AUTH_ALLOWED.

## Timeline

- 2026-10-23T21:57:32+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-25784
- 2026-10-24T07:15:51+00:00 epss https://api.first.org/data/v1/epss?cve=CVE-2026-25784

## From the sources

Initialization of a Resource with an Insecure Default vulnerability in Hallo Welt! GmbH BlueSpice (container image bluespice/wiki) allows privilege escalation. The default value of $mwsgTokenAuthenticatorServiceCIDR in the container's LocalSettings.php was intended to restrict internal service authentication to the container network, but evaluated to an empty string when the environment variable WIKI_SERVICE_TOKEN_AUTH_ALLOWED was not set. An empty value disables the IP restriction in the token authenticator component (mwstake/mediawiki-component-token-authenticator). As a result, any user with read access to the wiki (anonymous users on publicly readable wikis) could obtain an application token from the REST API and use it to get a session with sysop privileges as the internal service user.

This issue affects BlueSpice: from 5.2.3 before 5.2.7, and the 5.2.7 container images published before 2026-10-19 15:37 UTC.

---

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