{"items":[{"id":"NVI-00013134","kind":"vulnerability","title":"OpenC3 COSMOS: Stored, cross-user XSS via Telemetry screen BUTTON widget","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-gvf2-2rh5-mpgf","CVE-2026-77394"],"plain_summary":"GitHub lists this reviewed advisory for @openc3/vue-common. 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-705a474817671d145781384f8e0eb01e"],"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":"2026-09-23T21:24:12.000Z","value":"7.6 high","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-705a474817671d145781384f8e0eb01e"}],"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-705a474817671d145781384f8e0eb01e","url":"https://github.com/advisories/GHSA-gvf2-2rh5-mpgf","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-gvf2-2rh5-mpgf","publisher":"GitHub Advisory Database","observed_at":"2026-11-01T07:25:10.521Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-705a474817671d145781384f8e0eb01e"],"technology":"@openc3/vue-common","known_exclusions":[],"conditions_summary":"## Summary\nA user who can save a telemetry **screen** (permission `system_set`) can embed JavaScript in a screen `BUTTON` widget. The `BUTTON` widget **`eval()`s the stored button text in the browser** when the button is activated, and screens are **shared content rendered to other users in the scope**. As a result, an attacker's stored JavaScript executes **in a different operator's authenticated session** — a **stored, cross-user XSS** (not self-XSS). The payload runs in the COSMOS origin and can read `localStorage.openc3Token` (the victim's session token), enabling **session/account takeover** and, via the victim's privileges, a path to server-side code execution through the Script Runner.\n\nThe site's Content-Security-Policy permits `'unsafe-inline'`/`'unsafe-eval'` (see \"Contributing factor\"), so the injected script runs unimpeded.\n\n- **Product:** OpenC3 COSMOS (Core; likely Enterprise — see scoping note)\n- **Affected version:** confirmed **7.2.0** (latest, tested 2026-06-25); the code path is present on `main`. Lower bound for maintainer to confirm.\n- **Reporter:** _Arpit Kubadia_ \n\n## Description & root cause\n1. **Screen save (the store):** `POST /openc3-api/screen` → `Screen","public_affected_ranges":[">= 5.0.6, <= 7.2.1"]}],"null_published_at":"2026-11-01T07:29:12.925Z","source_updated_at":"2026-09-23T21:24:12.000Z","source_disclosed_at":"2026-09-23T21:24:11.000Z","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":"2026-11-01T07:25:10.521Z"}],"next_cursor":null,"snapshot_revision":"42594"}