CVE-2026-44783 Discourse: Replying to a whisper lets non-whisperers create staff-only whisper posts

Discourse is an open-source discussion platform. From versions 2026.1.0-latest to before 2026.1.4, 2026.3.0-latest to before 2026.3.1, and 2026.4.0-latest to before 2026.4.1, a flaw in how replies to whisper posts are handled allows authenticated users outside the groups configured in...

CVE-2026-44783

Product/Component : Discourse (open-source discussion platform). Issue : A flaw in how replies to whispers is handled allows authenticated users outside the groups configured in whispers_allowed_groups to post into a topic’s staff-only whisper channel. The injected content is visible to whisperer...

CVE-2026-33398

NamelessMC is website software for Minecraft servers. In version 2.2.4, modules/Forum/pages/forum/getquotes.php only checks whether the caller is logged in, then reads a post by attacker-controlled post ID and returns its content. The backend helper in modules/Forum/classes/Forum.php does not...

CVE-2026-33398

NamelessMC is website software for Minecraft servers. In version 2.2.4, modules/Forum/pages/forum/getquotes.php only checks whether the caller is logged in, then reads a post by attacker-controlled post ID and returns its content. The backend helper in modules/Forum/classes/Forum.php does not...

CVE-2026-33398 Authenticated users can read hidden forum posts through `/forum/get_quotes`

NamelessMC is website software for Minecraft servers. In version 2.2.4, modules/Forum/pages/forum/getquotes.php only checks whether the caller is logged in, then reads a post by attacker-controlled post ID and returns its content. The backend helper in modules/Forum/classes/Forum.php does not...

CVE-2026-27481

Discourse is an open-source discussion platform. From versions 2026.1.0-latest to before 2026.1.3, 2026.2.0-latest to before 2026.2.2, and 2026.3.0-latest to before 2026.3.0, an authorization bypass vulnerability allows unauthenticated or unauthorized users to view hidden staff-only tags and its...

CVE-2026-27481

Discourse is an open-source discussion platform. From versions 2026.1.0-latest to before 2026.1.3, 2026.2.0-latest to before 2026.2.2, and 2026.3.0-latest to before 2026.3.0, an authorization bypass vulnerability allows unauthenticated or unauthorized users to view hidden staff-only tags and its...

CVE-2026-27481 Discourse: Hidden tag visibility bypass on tag routes

Discourse is an open-source discussion platform. From versions 2026.1.0-latest to before 2026.1.3, 2026.2.0-latest to before 2026.2.2, and 2026.3.0-latest to before 2026.3.0, an authorization bypass vulnerability allows unauthenticated or unauthorized users to view hidden staff-only tags and its...

EUVD-2026-18866

Discourse is an open-source discussion platform. From versions 2026.1.0-latest to before 2026.1.3, 2026.2.0-latest to before 2026.2.2, and 2026.3.0-latest to before 2026.3.0, an authorization bypass vulnerability allows unauthenticated or unauthorized users to view hidden staff-only tags and its...

CVE-2026-27481 Discourse: Hidden tag visibility bypass on tag routes

Discourse is an open-source discussion platform. From versions 2026.1.0-latest to before 2026.1.3, 2026.2.0-latest to before 2026.2.2, and 2026.3.0-latest to before 2026.3.0, an authorization bypass vulnerability allows unauthenticated or unauthorized users to view hidden staff-only tags and its...

CVE-2026-32620

Discourse is an open-source discussion platform. From versions 2026.1.0-latest to before 2026.1.3, 2026.2.0-latest to before 2026.2.2, and 2026.3.0-latest to before 2026.3.0, non-staff users could access read receipt information for staff-only posts they weren't supposed to see. No post content w...

CVE-2026-27491

Discourse is an open-source discussion platform. Prior to versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2, a type coercion issue in a post actions API endpoint allowed non-staff users to issue warnings to other users. Warnings are a staff-only moderation feature. The vulnerability required the...

CVE-2026-28227 Discourse Vulnerable to Unauthorized Topic Creation in Staff-Only Categories via Topic Timer publish_to_category

Discourse is an open source discussion platform. Prior to versions 2025.12.2, 2026.1.1, and 2026.2.0, TL4 users can publish topics into staff-only categories via the publishtocategory topic timer, bypassing authorization checks. Versions 2025.12.2, 2026.1.1, and 2026.2.0 patch the issue. No known...

CVE-2025-68660

Discourse is an open source discussion platform. In versions prior to 3.5.4, 2025.11.2, 2025.12.1, and 2026.1.0, an endpoint lets any authenticated user bypass the aidiscoverpersona access controls and gain ongoing DM access to personas that may be wired to staff-only categories, RAG document set...

About the Security Announcements category

Security announcements for the Elastic stack. To report a security vulnerability, please follow the instructions on ourSecurity Issues page. Posting to this category is restricted to staff only...