Vulnerability Description
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 Score
CRITICAL
Related Weaknesses (CWE)
References
- https://en.wiki.bluespice.com/wiki/Security:Security_Advisories/BSSA-2026-07
- https://github.com/hallowelt/docker-bluespice-wiki/commit/04b840be565b508f6e741c
FAQ
What is CVE-2026-25784?
CVE-2026-25784 is a vulnerability with a CVSS score of 9.8 (CRITICAL). 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 $mwsgTokenAuthentic...
How severe is CVE-2026-25784?
CVE-2026-25784 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2026-25784?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.