{"items":[{"id":"NVI-00018461","kind":"vulnerability","title":"Avo: Broken Access Control Through Unauthorized Execution of Arbitrary Action Classes Across Resources","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-qc5p-3mg5-9fh8","CVE-2026-42205"],"plain_summary":"GitHub lists this reviewed advisory for avo. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-28aae352143dd2eb98f4027f271eb8c7"],"action_type":"investigate","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[{"kind":"CVSS","as_of":"2026-06-08T23:17:54.000Z","value":"8.8 high","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-28aae352143dd2eb98f4027f271eb8c7"}],"why_it_matters":"Published affected context helps an owner decide what evidence to gather. This report has not examined your application.","related_sources":[{"id":"sr-28aae352143dd2eb98f4027f271eb8c7","url":"https://github.com/advisories/GHSA-qc5p-3mg5-9fh8","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-qc5p-3mg5-9fh8","publisher":"GitHub Advisory Database","observed_at":"2026-11-07T00:51:53.608Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-28aae352143dd2eb98f4027f271eb8c7"],"technology":"avo","known_exclusions":[],"conditions_summary":"### Summary\n\nA critical Broken Access Control vulnerability was identified in the `ActionsController` of the Avo framework (v3.x). Due to insecure action lookup logic, an authenticated user can execute any Action class (descendants of `Avo::BaseAction`) on any resource, even if the action is not registered for that specific resource. This leads to Privilege Escalation and unauthorized data manipulation across the entire application.\n\n### Details\n\nThe vulnerability exists in the `action_class` method within `app/controllers/avo/actions_controller.rb`.\n\n#### Vulnerable Code\n\n```ruby\ndef action_class\n  # It searches through ALL descendants of BaseAction without resource validation\n  Avo::BaseAction.descendants.find do |action|\n    action.to_s == params[:action_id]\n  end\nend\n```\n\nThe controller identifies the action class to execute solely based on the `params[:action_id]` by searching through all `BaseAction` descendants. It fails to verify whether the requested action is actually permitted or registered for the resource context specified in the request URL (e.g., `/admin/resources/posts/actions`).\n\nConsequently, an attacker can invoke sensitive actions (e.g., `Avo::Actions::ToggleAdm","public_affected_ranges":["< 3.31.2"]}],"null_published_at":"2026-11-07T07:07:39.839Z","source_updated_at":"2026-06-08T23:17:54.000Z","source_disclosed_at":"2026-04-24T16:11:28.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"First indexed by Null; source disclosure date is shown separately.","null_first_observed_at":"2026-11-07T00:51:53.608Z"}],"next_cursor":null,"snapshot_revision":"42594"}