# CVE-2026-25784: Initialization of a Resource with an Insecure Default vulnerability in Hallo Welt!


- **Severity:** Critical 9.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Fix available:** No
- **Published:** 23 Oct 2026
- **Updated:** 23 Oct 2026
- **Also known as:** GHSA-xrr7-cjx6-x9j2

## What is CVE-2026-25784?

CVE-2026-25784 is a critical vulnerability in Hallo Welt! GmbH BlueSpice, published on 23 Oct 2026. 

### Official 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.

Weakness: CWE-269 (Improper Privilege Management), CWE-1188 (Initialization of a Resource with an Insecure Default)

## Which versions are affected by CVE-2026-25784?


## How do I fix CVE-2026-25784?

No fix has been published for CVE-2026-25784 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-25784 being exploited?

There is no known exploitation of CVE-2026-25784 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-25784 and fix it if it is affected.

What it is: CVE-2026-25784 is a critical vulnerability in Hallo Welt! GmbH BlueSpice, published on 23 Oct 2026. 
Exploitation: There is no known exploitation of CVE-2026-25784 in the wild and no public exploit code.

Affected product: Hallo Welt! GmbH BlueSpice. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-25784/ (Markdown: https://insights.sbomify.com/CVE-2026-25784/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-25784
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-25784
- OSV: https://osv.dev/vulnerability/CVE-2026-25784

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-25784/
Summaries are generated and may contain mistakes; the official description above is the record.