Vikunja: Link-share principal-type confusion enables cross-account team removal, bot takeover, and roster disclosure

Summary Vikunja's web.Auth interface pkg/web/web.go, single method GetID int64 is satisfied by BOTH user.User and models.LinkSharing. A link-share's GetID returns the raw positive share.ID pkg/models/linksharing.go:83-85, which lives in the same positive autoincrement ID space as users.id. The sa...

GHSA-32R8-5843-4QW2 Vikunja: Link-share principal-type confusion enables cross-account team removal, bot takeover, and roster disclosure

Summary Vikunja's web.Auth interface pkg/web/web.go, single method GetID int64 is satisfied by BOTH user.User and models.LinkSharing. A link-share's GetID returns the raw positive share.ID pkg/models/linksharing.go:83-85, which lives in the same positive autoincrement ID space as users.id. The sa...

GHSA-9XWC-VWWW-QQMW Duplicate Advisory: Vikunja: Link-share principal-type confusion enables cross-account team removal, bot takeover, and roster disclosure

Duplicate Advisory This advisory has been withdrawn because it is a duplicate of GHSA-32r8-5843-4qw2. This link is maintained to preserve external references. Original Description Vikunja through 2.4.0 contains a principal-type confusion vulnerability where LinkSharing principals with id N are...

Duplicate Advisory: Vikunja: Link-share principal-type confusion enables cross-account team removal, bot takeover, and roster disclosure

Duplicate Advisory This advisory has been withdrawn because it is a duplicate of GHSA-32r8-5843-4qw2. This link is maintained to preserve external references. Original Description Vikunja through 2.4.0 contains a principal-type confusion vulnerability where LinkSharing principals with id N are...

CVE-2026-9693 Mattermost thread memberships persist after team removal, exposing private channel thread metadata on re-invite

Mattermost versions 10.11.x = 10.11.20, 11.7.x = 11.7.5 Mattermost fails to remove thread membership records when a user is removed from or leaves a team, which allows a previously removed user who is later re-invited to the team to view private channel thread root post content and metadata via t...

CVE-2026-9693 Mattermost thread memberships persist after team removal, exposing private channel thread metadata on re-invite

Mattermost versions 10.11.x = 10.11.20, 11.7.x = 11.7.5 Mattermost fails to remove thread membership records when a user is removed from or leaves a team, which allows a previously removed user who is later re-invited to the team to view private channel thread root post content and metadata via t...

CVE-2026-9693 Mattermost thread memberships persist after team removal, exposing private channel thread metadata on re-invite

Mattermost versions 10.11.x = 10.11.20, 11.7.x = 11.7.5 Mattermost fails to remove thread membership records when a user is removed from or leaves a team, which allows a previously removed user who is later re-invited to the team to view private channel thread root post content and metadata via t...

HackerOne: Minimum bounty of a private program is visible for users that were removed from the program

Hello, Privileged information is getting leaked to an unauthorized user in the json response of https://hackerone.com/reports/.json. In a team there can be many members, also roles are defined. But an x-member of the team is getting information which should not be visible to him. As I tested it o...