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discourse/lib/guardian
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discoursebot 5323dfddaa
 SECURITY: Block requests for hidden post revisions through historical version reconstruction [backport 2026.6] (#42271) 
Backport of #42269 to release/2026.6.

---

## Summary

Prevent unauthorized disclosure of moderator-hidden post revisions by
blocking non-staff historical version requests when a hidden revision
exists at or before the requested version. The controller now uses a
dedicated Guardian predicate to enforce this range-based authorization
before reconstructing post content. Staff retain legitimate access
through their existing hidden-revision review permission.

## Source

- Patch Triage: https://patch.discourse.org/patch-triage/1113

Co-authored-by: discourse-patch-triage
<272280883+discourse-patch-triage[bot]@users.noreply.github.com>

Co-authored-by: Mark VanLandingham <markvanlan@gmail.com>
2026-08-03 12:28:43 -05:00
..
bookmark_guardian.rb
category_guardian.rb FEATURE: Support group based category posting review modes (#38707) 2026-04-07 10:41:16 +08:00
ensure_magic.rb
flag_guardian.rb
group_guardian.rb FEATURE: Split setting for allowing mods to manage categories and groups (#35174) 2025-10-06 10:43:42 +03:00
invite_guardian.rb DEV: Invites destroy_all_expired allows staff to delete any user's expired invites (#38281) 2026-03-05 09:59:48 -06:00
localization_guardian.rb FEATURE: Localizable /about page fields via its settings page (#41123) 2026-06-26 20:41:08 +08:00
permalink_guardian.rb SECURITY: prevent permalink redirects from leaking restricted slugs 2026-01-28 17:11:14 +00:00
post_guardian.rb FIX: Hidden post excerpts can be returned by group activity serializers (#40217) 2026-05-21 15:28:41 +08:00
post_revision_guardian.rb SECURITY: Block requests for hidden post revisions through historical version reconstruction [backport 2026.6] (#42271) 2026-08-03 12:28:43 -05:00
sidebar_guardian.rb
staff_action_log_guardian.rb SECURITY: Restrict staff action logs visibility for moderators 2026-01-28 17:11:14 +00:00
tag_guardian.rb FIX: Don't auto-remove chat members from logged_in_users group (#40543) 2026-06-03 18:15:32 +02:00
topic_guardian.rb SECURITY: Scope PM reviewables to their allowed audience [backport 2026.6] 2026-07-28 17:05:36 +02:00
upload_guardian.rb FIX: Enforce secure-upload ACL in AI bot prompt path (#39903) 2026-05-13 09:55:32 +08:00
user_guardian.rb FIX: Post serialization exposes hidden-profile user status messages (#40885) 2026-06-15 09:25:47 -05:00