open-webui/backend/open_webui
Classic298 fc94118b2d
fix: prevent mass-assignment user_id spoofing in POST /api/v1/evaluations/feedback (#24508)
* fix: prevent mass-assignment user_id spoofing in POST /api/v1/evaluations/feedback

Two independent gaps in backend/open_webui/models/feedbacks.py let an
authenticated caller forge the `user_id` (and `id`, `version`) on a new
feedback record submitted to POST /api/v1/evaluations/feedback:

1. `FeedbackForm` declared `model_config = ConfigDict(extra='allow')`,
   so Pydantic preserved any extra fields supplied in the request body —
   including `user_id`, `id`, `version`. The form is the public input
   boundary for the endpoint and should not accept unknown fields.

2. In `insert_new_feedback`, the dict literal placed
   `**form_data.model_dump()` AFTER `'id': id`, `'user_id': user_id`,
   `'version': 0`. Python dict-literal duplicate-key resolution is
   last-wins, so any of those fields present in `form_data` overwrote
   the server-derived values.

Combined effect: a regular user could POST a feedback record with an
arbitrary `user_id`, attributing the rating to any other user. The Elo
leaderboard at backend/open_webui/routers/evaluations.py computes model
rankings from these records, and the admin export
(GET /api/v1/evaluations/feedbacks/export) and admin list
(GET /api/v1/evaluations/feedbacks/all) display the spoofed attribution.

Two fixes, defense-in-depth:

- FeedbackForm: switch `extra='allow'` to `extra='ignore'` so Pydantic
  drops unknown fields at parse time. Sub-models (RatingData / MetaData /
  SnapshotData) intentionally keep `extra='allow'` because their contents
  are deliberately schema-flexible — the spoofing surface was the form,
  not the sub-payloads.

- insert_new_feedback: spread `form_data.model_dump()` first, then
  overlay server-controlled fields (`id`, `user_id`, `version`,
  `created_at`, `updated_at`) so the explicit keys win on duplicate-key
  resolution regardless of what reaches the function. Matches the secure
  pattern already used in backend/open_webui/models/functions.py:120.

Reported by yantongggg in GHSA-rjmp-vjf2-qf4g. Same root-cause class as
the prior published GHSA-hr43-rjmr-7wmm (folder mass-assignment, fixed
in v0.9.0); that fix did not generalize across the codebase, this fix
closes the feedback variant.

Co-authored-by: yantongggg <yantongggg@users.noreply.github.com>

* chore: trim comments

---------

Co-authored-by: yantongggg <yantongggg@users.noreply.github.com>
2026-05-11 01:16:17 +09:00
..
data refac: mv backend files to /open_webui dir 2024-09-04 16:54:48 +02:00
internal chore: format 2026-05-09 15:25:27 +09:00
migrations chore: format 2026-05-09 15:25:27 +09:00
models fix: prevent mass-assignment user_id spoofing in POST /api/v1/evaluations/feedback (#24508) 2026-05-11 01:16:17 +09:00
retrieval fix: reject parser-confusing chars in validate_url to close SSRF bypass (#24534) 2026-05-11 00:57:48 +09:00
routers refac 2026-05-11 01:15:34 +09:00
socket refac 2026-05-09 15:21:31 +09:00
static chore: format 2026-04-19 22:45:54 +09:00
storage refac 2026-04-12 19:08:30 -05:00
test refac 2026-03-17 17:58:01 -05:00
tools chore: format 2026-05-09 15:25:27 +09:00
utils fix: prevent redirect-based SSRF and enforce collecton write access (#24524) 2026-05-11 01:09:15 +09:00
__init__.py refac 2026-05-09 02:38:08 +09:00
alembic.ini fix: Alembic CLI commands from failing 2025-08-15 04:17:47 -04:00
config.py refac 2026-05-11 01:15:34 +09:00
constants.py chore: format 2026-04-14 17:27:31 -05:00
env.py refac 2026-05-09 21:05:49 +09:00
functions.py refac 2026-05-09 04:17:58 +09:00
main.py chore: format 2026-05-09 15:25:27 +09:00
tasks.py refac 2026-03-17 17:58:01 -05:00