CVE-2026-1776

Camaleon CMS before 2.9.2 contains an insecure direct object reference vulnerability in Admin::CategoriesController that allows authenticated users to modify unauthorized categories by referencing arbitrary category IDs. Users authorized for one post type can send update or destroy requests pairing another category ID with their authorized post_type_id to rename or delete categories.

Camaleon CMS before 2.9.2 contains a missing authorization vulnerability in Admin::MediaController that allows low-privileged authenticated users to bypass the role-based Media permission. Attackers can POST to /admin/media/upload to store files, read private media via download_private_file, and use crop with saved_avatar to change other users' avatars.

Camaleon CMS before 2.9.3 contains a path traversal vulnerability that allows users with only the media permission to write arbitrary files by supplying ../ sequences in the name parameter. Attackers can send a base64 data: URI to the crop_url media action to write an ERB template into a theme's views directory, which executes when rendered.

A flaw has been found in owen2345 Camaleon CMS up to 2.9.2. Impacted is the function crop of the file app/controllers/camaleon_cms/admin/media_controller.rb of the component Media Crop Handler. This manipulation of the argument saved_avatar causes authorization bypass. The attack may be initiated remotely. The exploit has been published and may be used. Upgrading to version 2.9.3 is recommended to address this issue. Patch name: c143e145caa600947e70a240e87f2fed889149d3. It is suggested to upgrade the affected component.

Camaleon CMS versions 2.7.5 through 2.9.1 fail to validate redirect targets when fetching remote files in the 'Upload from URL' media feature. Authenticated attackers can supply URLs that pass initial validation but redirect to internal network addresses, allowing server-side request forgery to internal services.

Camaleon CMS up to version 2.9.2 (fixed in commit 88ab703) contains a missing authorization vulnerability on the drafts endpoint. Any authenticated low-privileged user can create draft posts by bypassing role and permission checks, sending requests to the drafts endpoint using only session authentication.

A vulnerability in Camaleon CMS allows an authenticated user with custom field management permissions to execute arbitrary Ruby code. A malicious expression in the select_eval field is evaluated via instance_eval when rendering the post edit page.

Camaleon CMS 2.9.2 contains an improper authorization vulnerability in the administrator draft autosave endpoint. A low-privileged authenticated user can send an arbitrary post_id to POST /admin/post_type/<POST_TYPE_ID>/drafts and overwrite the draft associated with another user's post.