CVE-2026-25784bluespice/wiki container: Insecure default configuration of service token authentication allows privilege escalation to sysop

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.

CVSS

9.8 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness (CWE)

CWE-1188, CWE-269

Known exploited

Not in CISA's KEV catalog

EPSS (exploitation in the next 30 days)

0.34% (percentile 28)

Assigned by

HW

NVD analysis

Deferred

Record last updated

Oct 23, 2026

First seen by InfoSec Signals

Oct 23, 2026

The CVE record on cve.org · NVD's entry

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