Every other group route asks StaffLibraryScope whether this viewer may
act on this group. GroupsController::update() and ::destroy() do, and so
do their API twins -- all four with abort_unless(allowsGroupChange, 404).
The two that read do not: edit() and Api\GroupsController::show() had no
boundary at all.
What they hand over is the membership, name and email per member, plus
the whole client roster of the installation as available_clients. So a
client-scoped staff member could open a group whose contents they cannot
see, read off every client on the installation, and only be refused when
they pressed save.
Two halves, because the leak has two shapes:
- The group itself. Reading it now asks the same reach question the write
half asks, one step earlier, with the same 404 -- a group that reaches
past the viewer's library is not theirs to open either.
- The lists inside it. Both narrow through StaffLibraryScope::clients(),
the listing half of the rule this screen's buttons are already guarded
with: allowsGroupMembership refuses removing a member outside the
roster, and refuses adding a client outside it. Naming them anyway,
with their address, is the mistake ClientsController made before
clients() existed -- that method's own docblock says so.
The reach guard alone would not have been enough. A group nobody has
shared anything with reaches nowhere, so it stays open to everybody --
and it can still hold a stranger's client. That case is why the lists
narrow separately, and there is a test for it.
members_count is left whole on purpose: a size is not an identity, and it
is the same number the group listing already reports.
GroupResource's docblock claimed members are safe to expose because "the
group edit screen already shows [them] to anyone holding edit_groups".
That was a claim about a screen, and it stopped being true the moment the
screen narrowed. Reworded to say what now holds it up, and where.
Not changed: the group listing. It reports names and member counts, not
identities, and every button on it is guarded. Nor Api\GroupsController::
index(), for the same reason. Nor the API document -- scramble:export is
byte-identical, because GET /groups/{group} already documented a 404.
Four tests. Three measured red against the unguarded controllers (3
failed / 21 passed): the group cannot be opened at all, the edit screen
stops naming strangers, and the API twin narrows what it hands back. The
fourth -- an unscoped viewer keeps the whole roster and every member -- is
green either way and guards against the fix over-refusing.
Full suite passes (2052 passed / 2 skipped), PHPStan level 8 clean.
This overturns something #1701 decided, so it should say so. That PR
closed the membership hole and left GroupsController::update and
destroy installation-wide on purpose, on the grounds that managing the
group object is a different question from managing who is in it.
What decides it is a measurement that was not in front of that decision.
An assignment to a group is how its members reach a file, so deleting a
group revokes that access for every member. Measured before this guard,
with a client-scoped role holding the group permissions:
stranger client can read the shared file true
PATCH /groups/{stranger group} 302, renamed
DELETE /groups/{stranger group} 302, group gone
stranger client can read the shared file false
So a staff member who may not add somebody to a group out of their reach
could delete it out from under the people already in it. That is not a
gentler version of the membership rule, it is a harder one, and the two
sitting on opposite sides of the same boundary was the odd part.
StaffLibraryScope::allowsGroupChange is the reach half of
allowsGroupMembership on its own, since no client appears in this
question -- one predicate, two callers, rather than a second statement of
it. Both surfaces take it, at 404, matching the membership guards.
A group that shares nothing beyond the actor's library still passes, so a
group they created or one holding their own clients stays theirs, and
unscoped staff are unaffected by construction.
The API document moves a 404 above a 422 on two paths. Both already
documented the 404 -- route model binding produced one -- and Scramble
orders responses by where they appear in the method, so the guard landing
before the validate() call is the whole of the change.
#1701 closed a real hole: group membership decides what a client reaches,
and through File::scopeVisibleToClient it decides what the staff member
holding that client reaches, so `edit_groups` alone was never a boundary.
The predicate it added asks whether everything shared with a group is
already inside the actor's library.
It asked by counting: pluck the group's assignment rows, count how many
of those ids the library query returns, and require the two to match. An
assignment row outlives the thing it points at — nothing clears them when
a file or folder is deleted — while files() and folders() exclude trashed
rows by construction. So one deleted file left a count that could never
balance again, and the group closed permanently: the scoped staff member
could no longer add their own client to it, or remove anybody from it,
with a 403 and nothing to explain it. Every group accumulates dead
assignments over time, so groups would have gone quiet one at a time.
Asked the other way round — is there anything live, shared with this
group, that is outside my library — the dead rows drop out by
construction, because the query starts from File/Folder rather than from
the assignment. That is also the truer question: a deleted file is not
reach, since nobody can reach it.
Three tests. A group stays usable after a file shared with it is deleted,
including removing a member; the same for a deleted folder assignment;
and the half that must not soften — a live file still out of reach is
still refused, deleted siblings or not.
The four routes that edit a group's membership -- add and remove, web
and API -- contain no authorization call of any kind. `can:edit_groups`
in front of them is the whole of it, and a permission is not a boundary.
The authorization sweep looked at these and let them stand, on the
grounds that groups are installation-wide by design: GroupsController
::index lists every group unfiltered, so list and single-object access
agree, and there is no listing/direct-access mismatch to fix. That is
true, and it is the answer to the question of who may *see* a group.
This is a different question: what a write to one *does*.
Joining a group hands the new member everything shared with it. When
that member is one of a client-scoped staff member's own clients,
File::scopeVisibleToClient hands the same content straight back to them
-- that scope is what StaffLibraryScope::files() is built out of. So the
one write turns a file they get a 403 on into a file in their library,
and the download that follows is a 200. ResolvesShareTargets draws that
line on the sharing path through canAssignGroup(); nobody drew it on the
membership path, and canAssignGroup() is *derived from membership*, so
whoever may edit the list also decides what the list entitles them to.
StaffLibraryScope::allowsGroupMembership answers it directly instead of
through the derived predicate, which is the wrong tool here twice over.
Membership asks about reach, so it checks reach: the client must be one
this staff member holds, and the group must not already reach past their
library -- no file assigned to it, and no folder shared with it, outside
StaffLibraryScope. A group nothing has been shared with passes trivially,
which matters, because canAssignGroup() would have said no to a group
that has no members yet and left a scoped staff member unable to put the
first client into one they had just created.
The same write has a second door. MembershipRequestsController::approve
joins a client to a group with identical consequences, under
`approve_groups_memberships_requests`, and deny() decides about somebody
else's client and emails them about it. Both go through the same
boundary, answering 404 to match the guard already above approve().
The queue and its sidebar badge are narrowed to the clients the viewer
holds, through one scope on the model that both read -- the rule the
comment badge in HandleInertiaRequests already states two branches down
("a client-scoped staff member is not shown a number they cannot act
on"), and the reason VisibleCommentScope owns its own pendingTotal()
rather than leaving the middleware to count for itself. Each row carries
the client's name and email, so an unnarrowed queue was also handing
those over for clients outside the roster. Unscoped staff still see every
pending request.
That narrowing is on the client, not on the group: whether a group is
reachable depends on what is shared with it, which is not a question to
ask row by row in a listing. A scoped viewer may therefore still be
shown a request they would be refused on -- one of their own clients
asking to join a group out of their reach. The names were the part that
leaked.
Unscoped staff are unaffected throughout -- both halves of the predicate
are true for them by construction. No seeded role reaches this: Client
Manager is the only client-scoped role that ships, and it holds no group
permissions, so a custom role is needed to get here at all.
The published API document gains a 403 on both member routes.
Regenerated with php artisan scramble:export; Scramble reads abort_unless
out of the method body but not out of a private helper, which is why the
guard is written out at each of the four call sites rather than shared.
approve() refuses a request that is not pending:
abort_unless($group !== null && $client !== null
&& $membershipRequest->status === MembershipRequest::STATUS_PENDING, 404);
deny(), one method below, checks nothing. Denying is not idempotent, so
repeating it is not a no-op:
- denied_at is stamped again, and that is what the client's re-request
cooldown counts from (MyGroupsController::inDenyCooldown). Repeating
the request keeps one client out of one group for as long as somebody
cares to keep asking, without a single new decision being made.
- a second GroupMembershipDenied entry goes into the activity log, for
a denial that did not happen.
- a second "your request was declined" mail goes to the client.
The queue lists only pending requests, so nothing on the screen offers
this; it takes asking for the route directly. It needs
approve_groups_memberships_requests, so it is not a stranger's move.
The guard is the same one, answering the same 404, placed where deny()
can reach it. deny() keeps tolerating a vanished group or client -- that
tolerance is deliberate and separate: the denied row persists for the
cooldown even when the group it named is gone, and index() already
filters those rows out with whereHas.
Not in this change: deny() writes the status, the log entry and the
notification without a shared transaction. approve() has exactly the same
shape, so fixing one alone would replace a symmetry with a difference,
and doing both means also deciding where the mail sits relative to the
commit -- which is the question #1691 answers for file bytes, and worth
answering on its own rather than inside a state-machine fix.
5754016 moved this controller's thumbnail() and preview() onto
StoredFileResponse and left download(), the last method in the same
class, building its own response:
'X-Accel-Redirect' => '/protected-files/'.$file->path,
That prefix is nginx's internal location for the local files disk, and
$file->disk is never consulted. On an install with external storage
switched on it names a path nothing ever wrote, so the public download
fails — while the same file downloads correctly from the file manager
and from a share link, and previews correctly from this very page,
because all three go through the object that knows the rule.
That commit's own message names the shape: the knowledge "was sitting in
a private method on one class and inline in another, so the next caller
could not inherit it and did not". It is an object now, and this is the
call site that was not moved onto it. StoredFileResponse is already
injected here as $this->bytes — preview(), two methods above, uses it —
and attachment() is the method FileDownloadController and
PublicShareController already call.
Nothing changes for a local install: attachment() emits the same four
headers this method wrote by hand, through the same ContentDisposition
call. The return type widens to Response|RedirectResponse because a
non-local disk answers with a redirect to a presigned URL, which is the
signature preview() already declares.
The regression test fails against the unfixed controller — checked in
both directions rather than assumed. The existing local-disk case grew
assertions for the other three headers, so "unchanged for local" is
pinned rather than argued: it passes before and after.
Two routes still assumed every file sits on local disk, which stopped
being true the moment external storage was switched on. A share link
answered with X-Accel-Redirect whatever the file's disk said, pointing
nginx at a path it has nothing behind; a public listing built a
thumbnail from Storage::disk('files')->path(), which for an externally
stored file is a path nobody ever wrote. Both fail only for installs
using S3, and only on those two routes, so the same file downloading
correctly from the file manager made the share link look like the
broken thing rather than where the file lives.
Neither is a new rule. FileDownloadController and
FileThumbnailController already did it right, which is the actual
finding: the knowledge was sitting in a private method on one class and
inline in another, so the next caller could not inherit it and did not.
Both are now objects with one job.
StoredFileResponse replaces InlineFileResponse and grows an
attachment() alongside inline(), since the two differ only by
disposition. LocalSourceFile takes a closure rather than returning a
path: the version that returned one also left the caller to unlink it,
and both of those are exactly the mistakes made here.
The regression tests fail against the previous controllers — checked in
both directions rather than assumed.
publicListingFile() and publicListingImageFile() were defined in
PublicGroupsTest.php and used from PublicFilePreviewTest.php too. Pest
declares a test file's functions as ordinary globals, so that works only
once the defining file has been loaded — which under --parallel depends
on how the runner happens to distribute files across processes. Adding
any unrelated test file anywhere in the suite reshuffles that and takes
PublicFilePreviewTest.php down with "Call to undefined function", and
running it on its own with --filter never worked at all.
tests/Helpers.php exists for exactly this and its docblock describes this
failure; these two had just been missed. publicPageProps() stays where it
is, since only one file uses it.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
v1 could preview four kinds of file in a modal — images, video, audio and
PDF. v2 previewed only images, and not by decision: preview shipped as part
of the image *thumbnail* work (1c68aa1), so "previewable" quietly became a
synonym for "GD can decode it". FileThumbnailController::preview() gated on
ThumbnailGenerator::SUPPORTED_MIME_TYPES, the frontend mirrored the same
four types, and the dialog was a hardcoded <img>.
Rather than widen that list — it drives pathFor(), extensionFor(),
generate() and FileDiskCleanup, and a video reaching getimagesize() is a
500 — this separates the two questions. PreviewKind now answers "may these
bytes be served inline, and what element renders them?", while
ThumbnailGenerator keeps answering the narrower "can this app decode it
itself?", which is what renditions, the cache and the watermark hook
actually depend on. Image delegates to it so the two cannot drift.
The allowlist stays a security boundary: mime_type is sniffed from the
bytes, so text/html and image/svg+xml remain excluded, and PreviewKind is
deliberately narrower than "formats a browser might cope with" — no
quicktime, avi or matroska, because an embedded player for those shows a
black rectangle. Those still download exactly as before.
docs/security-audit-2026-08-05.md finding 1 recorded that adding
application/pdf "should be a conscious decision". This is that decision,
and three things were measured rather than assumed:
- An <iframe sandbox> cannot be used. Chrome refuses to run its PDF viewer
in a sandboxed frame at all (ERR_BLOCKED_BY_CLIENT, with or without
allow-same-origin) — the attribute removes the feature, it does not
harden it.
- nginx's `Content-Security-Policy: sandbox; default-src 'none'` on
/protected-files/ does work (a <video> frame lands in an opaque origin),
but Chrome exempts its PDF viewer from it, so it is not what protects
the PDF case.
- What does is the allowlist plus the browser's own PDF sandbox, where PDF
JavaScript has no DOM and no cookies.
Range requests were verified end to end: 206 with a correct Content-Range,
a byte-perfect file reassembled from three ranges, and a real browser
seeking to 10s of a 20s clip. nginx drops the upstream Content-Length on
the X-Accel path, so there is no collision.
Two settings, both defaulting on so no installation loses what it has:
clients_can_preview_files and public_listing_preview_enabled. Staff are
never gated. The anonymous side needed a route of its own — there was no
public preview endpoint — with its own throttle bucket, since a bare
throttle: shares one counter across that whole block.
A preview now logs at most one FilePreviewed per viewer per file per five
minutes: a <video> turns one deliberate act into a long tail of Range
requests, and a row each would bury the log.
Also fixes a layout bug the tests could never catch. A portal file row was
flex justify-between with three children — name, comment trigger, download
— so the middle one settled wherever the name happened to end and the
comment icon sat at a different place on every row. The name block now
takes the slack and every action lives in one trailing group, with the
comment trigger in a fixed-width slot so the icons form a column. And
because half the previewable files have no thumbnail to click — a PDF, an
mp3 and an mp4 all render as a generic icon — every row gains an explicit
PreviewAction beside DownloadAction, matching whatever style that theme
gives its download control.
Client file sharing, rebuilt from the ground up: a private area per
client, resumable uploads, folders, groups and categories, sharing with
expiry dates and download limits, comments, file versions, an activity
log, a REST API, and sixteen languages.
This repository begins here. ProjectSend 2 was developed privately, and
that development history is not published — the previous generation
remains available, with its own history, at projectsend/legacy.
Free software under the GNU General Public License v2, or (at your
option) any later version.
denkfabrik-li