---
id: "CVE-2026-116893"
kind: "vulnerability"
aliases: ["CVE-2026-116893"]
title: "REDAXO: missing authorization lets backend users manage packages and drop tables"
severity: "medium"
cvss: 6.8
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["cms", "package", "php", "redaxo", "self-hosted"]
not_affected_if: ["no-non-admin-backend-users", "version-5.21.5-or-later"]
published_at: "2026-10-27T11:17:32+00:00"
first_seen_at: "2026-10-27T11:31:27+00:00"
updated_at: "2026-10-27T11:31:58+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-116893", "first_seen_at": "2026-10-27T11:31:27+00:00"}]
---

# REDAXO: missing authorization lets backend users manage packages and drop tables

REDAXO core before 5.21.5 lets non-admin backend users install, activate, deactivate, and uninstall packages through the rex_api_package API using only a valid CSRF token. An attacker can uninstall system addons such as structure, which drops their database tables, and delete non-system packages.

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

## How to check

- Check the installed REDAXO core version in `redaxo/src/core/boot.php` or the backend system page: unknown whether the sources name a specific file.
- Review which backend users have non-admin roles that still hold active sessions, since the description says demoted admins with live sessions are the main risk.

## Fix

- Upgrade REDAXO core to `5.21.5` or later.
- Until upgraded, restrict backend access to trusted users only.

## Timeline

- 2026-10-27T11:31:27+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-116893

## From the sources

REDAXO core before 5.21.5 contains a missing authorization vulnerability in the rex_api_package API function that lets non-admin backend users manage packages with only a valid CSRF token. Attackers holding a token, such as demoted admins with active sessions, can uninstall system addons like structure (dropping their database tables), deactivate, install, or activate packages, and delete non-system packages.

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