# CVE-2026-116893: REDAXO core missing authorization in package API

Source: https://junglewise.ai/threats/cve-2026-116893-redaxo-core-before-5-21-5-contains-a-missing-authorization  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-27. Updated: 2026-10-27  
License: CC BY 4.0 with a link back

CVE-2026-116893 · Severity: medium · CVSS 6.8 · Published 2026-10-27

REDAXO is a content management system used to build and manage websites. The package API function, which manages system extensions and add-ons, failed to verify that users were administrators before allowing them to install, uninstall, activate, or deactivate packages. A demoted administrator or someone with a stolen session token could delete critical system add-ons like the structure module, destroying database tables and rendering the site non-functional.

Technologies: [REDAXO Core](https://junglewise.ai/threats/technologies/redaxo-core). Vendors: [REDAXO](https://junglewise.ai/threats/vendors/redaxo).

## Quick answers

**Is CVE-2026-116893 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-116893 being exploited in the wild.

**How severe is CVE-2026-116893?** Medium severity, with a CVSS score of 6.8, published 27 October 2026.

**Which products and versions are affected?** REDAXO Core before 5.21.5.

**Is there a fix for CVE-2026-116893?** Yes: fixed in 5.21.5. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-116893 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-116893?** Check whether you run REDAXO Core at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- Fixed in 5.21.5

## Technical details

The rex_api_package API function lacked authorization checks and only validated CSRF tokens, allowing any authenticated backend user with a valid token to execute package management operations. An attacker with a demoted admin session or a valid CSRF token obtained via another vulnerability could call the API to uninstall system add-ons (dropping database tables), deactivate packages, or delete non-system packages. The fix adds an admin permission check before allowing any package operation.

## Affected products

- REDAXO core before 5.21.5

## Timeline

- 2026-10-27: disclosed
- 2026-10-06: patched: Fix released in version 5.21.5

## References

- [https://github.com/redaxo/core/commit/bd96cf27c2ab919b8320264c9f5502753aa82f28](https://github.com/redaxo/core/commit/bd96cf27c2ab919b8320264c9f5502753aa82f28)
- [https://github.com/redaxo/core/security/advisories/GHSA-fw98-549m-whxx](https://github.com/redaxo/core/security/advisories/GHSA-fw98-549m-whxx)

## Related threats

- [REDAXO reflected XSS in backend packages API](https://junglewise.ai/threats/cve-2026-117538-redaxo-before-5-21-0-contains-a-reflected-cross-site-scripting)
- [REDAXO core authentication bypass in structure/history plugin](https://junglewise.ai/threats/cve-2026-117532-redaxo-core-from-5-3-0-before-5-21-4-contains-an-authentication)
- [REDAXO broken access control in slice operations](https://junglewise.ai/threats/cve-2026-116899-redaxo-before-5-21-4-contains-a-broken-access-control)
- [REDAXO missing authorization in structure/version and structure/history previews](https://junglewise.ai/threats/cve-2026-116897-redaxo-core-before-5-21-4-contains-a-missing-authorization)
- [REDAXO cross-site request forgery in safe mode toggle](https://junglewise.ai/threats/cve-2026-116895-redaxo-before-5-21-5-contains-a-cross-site-request-forgery)