Private/internal repository enumeration via bruteforce on a vulnerable URL

See merge request gitlab/gitlabhq!3491

Return 404 on LFS request if project doesn't exist

See merge request gitlab/gitlabhq!3506

Only assign merge params when allowed

See merge request gitlab/gitlabhq!3487

Pass all wiki markup formats through our Banzai pipeline filters

See merge request gitlab/gitlabhq!3485

Require Maintainer permission on group where project is transferred to

See merge request gitlab/gitlabhq!3486

Use the '\A' and '\z' regex anchors in `InternalRedirect` to mitigate an Open Redirect issue.

See merge request gitlab/gitlabhq!3488

Merge branch 'security-2914-labels-visible-despite-no-access-to-issues-repositories-12-4' into '12-4-stable'

Labels visible despite no access to issues & repositories

See merge request gitlab/gitlabhq!3489

Project path reveals labels from Private project if the issue is moved to public project

See merge request gitlab/gitlabhq!3490

Nested GraphQL query with circular relationship can cause Denial of Service

See merge request gitlab/gitlabhq!3492

Filter out search results based on permissions to avoid bugs leaking data

See merge request gitlab/gitlabhq!3496

Merge branch 'security-65756-ex-admin-attacker-can-comment-in-internalsecurity-65756-ex-admin-attacker-can-comment-in-internal-12-4' into '12-4-stable'

Improper access control allows the attacker to comment in internal commit after they are no longer admin

See merge request gitlab/gitlabhq!3497

Merge branch 'security-ag-hide-private-members-in-project-member-autocomplete-12-4' into '12-4-stable'

Hide private members in project member autocomplete

See merge request gitlab/gitlabhq!3503

- Include new types in SystemNoteMetadata
- Add Label and Milestone reference_pattern to
Mentionable::ReferenceRegexes to be checked for cross references

in a project members' list. Add tests for possible scenarios

Re-factor and remove N + 1 queries

Remove author from changelog

Don't use memoisation when not needed

Include users part of parents of project's group

Re-factor tests

Create and add users according to roles

Re-use group created earlier

Add incomplete test for ancestoral groups

Rename method to clarify category of groups

Skip pending test, remove comments not needed

Remove extra line

Include ancestors from invited groups as well

Add specs for participants service

Add more specs

Add more specs

use  instead of

Use public group owner instead of project maintainer to test owner acess

Remove tests that have now been moved into participants_service_spec

Use :context instead of :all

Create nested group instead of creating an ancestor separately

Add comment explaining doubt on the failing spec

Imrpove test setup

Optimize sql queries

Refactor specs file

Add rubocop disablement

Add special case for project owners

Add small refactor

Add explanation to the docs

Fix wording

Refactor group check

Add small changes in specs

Add cr remarks

Add cr remarks

Add specs

Add small refactor

Add code review remarks

Refactor for better database usage

Fix failing spec

Remove rubocop offences

Add cr remarks

When a user updates a merge request coming from a fork, they should
not be able to set `force_remove_source_branch` if they cannot push
code to the source project.

Otherwise developers of the target project could remove the source
branch of the source project by setting this flag through the API.

This will be used later for search filtering.

This is to be more consistent as there is already a :read_note policy in
NotePolicy. To keep other behaviour the same we've introduced a
Note#noteable_ability_name that is used anywhere this was expected.

- List all overly-recursive fields
- Reduce recursion threshold to 2
- Add test for not-recursive-enough query
- Use reusable methods in tests
- Add changelog
- Set changeable acceptable recursion level
- Add error check test helpers

Previously, when the wiki page format was anything other than `markdown`
or `asciidoc` the formatted content would be returned though a Gitaly
call. Gitaly in turn would delegate formatting to the gitlab-gollum-lib
gem, which in turn would delegate that to various gems (like RDoc for
`rdoc`) and then apply some very liberal sanitization.

It was too liberal!

This change brings our wiki content formatting in line with how we
format other markdown at GitLab, so we have a SSOT for sanitization.

https://gitlab.com/gitlab-org/gitlab/issues/30540

This method, #route_not_found, is executed as the final fallback for
unrecognized routes (as the name might imply.) We want to avoid
`#authenticate_user!` when calling `#route_not_found`;
`#authenticate_user!` can, depending on the request format, return a 401
instead of redirecting to a login page. This opens a subtle security
exploit where anonymous users will receive a 401 response when
attempting to access a private repo, while a recognized user will
receive a 404, exposing the existence of the private, hidden repo.

Use project scopes to filter project labels that are visible for user

Fixes https://dev.gitlab.org/gitlab/gitlabhq/issues/2934 and https://gitlab.com/gitlab-org/gitlab/issues/33569

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[ci skip]

Quarantine some ECDSA related tests due to bumping openssl

See merge request gitlab-org/gitlab!18016

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