{"id":"GHSA-9gjv-jvm7-vv2v","summary":"Gramps Web API: Private Sub-Object Data in Non-Private Objects Exposed to Guest Users","details":"## Summary\n\nUsers with the **Guest** role could receive private sub-object data (e.g. private alternate names, private addresses, private note/citation/media handles) through list API endpoints such as `GET /api/people/`, `GET /api/places/`, `GET /api/events/`, and all other object list endpoints.\n\n**This does not expose objects (people, places, events, …) that are themselves marked private.** Top-level private objects are correctly excluded from all responses. Only sub-object data attached to otherwise-public objects is affected.\n\n## Affected Versions\n\nAll versions of Gramps Web API prior to the fix.\n\n## Root Cause\n\nThe vulnerability originates from the behaviour of `PrivateProxyDb.iter_*()` in **Gramps core**. The `ProxyDbBase.__iter_object()` helper, which backs all `iter_*()` methods in `PrivateProxyDb`, correctly filters out top-level private objects but returns the remaining objects **unsanitized** — i.e. without stripping private sub-object references. In contrast, `PrivateProxyDb.get_*_from_handle()` does call the appropriate `sanitize_*()` function.\n\nGramps Web API's `ModifiedPrivateProxyDb` (which wraps the raw database for non-admin users) inherited this behaviour without override.\n\nThe same issue affects Gramps desktop features that consume `iter_*()` output: reports and exports generated via Gramps desktop using `PrivateProxyDb` may also include private sub-object data that should have been stripped.\n\n## Conditions Required\n\n**This issue only affects trees in which sub-objects have been explicitly marked private in Gramps desktop.** The Gramps Web frontend UI does not expose controls for setting the private flag on sub-objects (alternate names, addresses, notes,\ncitations, media references, event references, etc.). In practice, such flags are set in Gramps desktop and then synced or imported into Gramps Web.\n\n## Impact\n\nWhen the conditions above are met, a user with the Guest role querying any list endpoint receives:\n\n- **Full content** of private embedded sub-objects on people, such as alternate  names (first name, surname, etc.) and addresses (street, city, etc.).\n- **Handles referencing** private notes, citations, and media attached to places,  events, sources, and other objects. These reveal the *existence* of private\n  linked objects but not their content; fetching those objects by handle is  correctly blocked by the proxy.\n\n## Fix\n\n`ModifiedPrivateProxyDb` now overrides all `iter_*()` object methods to check `obj.get_privacy()` directly on the already-loaded object (eliminating the redundant per-object refetch) and to call the appropriate `sanitize_*()` function before yielding each object. This is consistent with the behaviour of `get_*_from_handle()` in `PrivateProxyDb`.","modified":"2026-04-09T20:35:47.981613Z","published":"2026-04-09T20:28:40Z","database_specific":{"nvd_published_at":null,"cwe_ids":["CWE-200"],"severity":"MODERATE","github_reviewed":true,"github_reviewed_at":"2026-04-09T20:28:40Z"},"references":[{"type":"WEB","url":"https://github.com/gramps-project/gramps-web-api/security/advisories/GHSA-9gjv-jvm7-vv2v"},{"type":"PACKAGE","url":"https://github.com/gramps-project/gramps-web-api"},{"type":"WEB","url":"https://github.com/gramps-project/gramps-web-api/releases/tag/v3.11.0"}],"affected":[{"package":{"name":"gramps-webapi","ecosystem":"PyPI","purl":"pkg:pypi/gramps-webapi"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.11.0"}]}],"versions":["0.1","0.2.1","0.2.2","0.2.3","0.3.0","0.3.1","0.3.2","0.4.0","0.4.1","0.4.2","0.4.3","0.4.4","0.5.0","0.5.1","0.6.0","0.6.1","0.7.0","1.0.0","1.1.0","1.1.1","1.1.10","1.1.11","1.1.2","1.1.3","1.1.4","1.1.5","1.1.6","1.1.7","1.1.8","1.1.9","1.2.0","1.2.1","1.3.0","1.3.1","1.3.2","1.4.0","1.4.1","1.4.2","1.5.0","1.5.1","1.6.0","2.0.0","2.1.0","2.2.0","2.2.1","2.3.0","2.3.1","2.4.0","2.4.1","2.4.2","2.4.3","2.5.0","2.5.1","2.5.2","2.5.3","2.6.0","2.7.0","2.8.0","2.8.1","2.8.2","2.9.0","2.9.1","2.9.2","3.0.0","3.0.1","3.0.2","3.1.0","3.10.0","3.2.0","3.3.0","3.4.0","3.4.1","3.5.0","3.6.0","3.7.0","3.7.1","3.8.0","3.9.0","3.9.1"],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/04/GHSA-9gjv-jvm7-vv2v/GHSA-9gjv-jvm7-vv2v.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N"}]}