2870 matches found
PT-2026-26434
Name of the Vulnerable Software and Affected Versions Discourse versions prior to 2026.3.0-latest.1 Discourse versions prior to 2026.2.1 Discourse versions prior to 2026.1.2 Description Discourse is an open-source discussion platform. Prior to versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2,...
Unspecified vulnerability in Discourse (CNVD-2026-17486)
Discourse is Discourse open source set of open source community discussion platform. The platform includes features such as community , e-mail and chat rooms . Discourse suffers from a security vulnerability that stems from a lack of validatebeforecreate authorization in Data Explorer's...
Discourse Access Control Error Vulnerability (CNVD-2026-17485)
Discourse is Discourse open source set of open source community discussion platform. The platform includes features such as community , e-mail and chat rooms . Discourse suffers from an Access Control Error vulnerability that stems from an open Access Control Failure in the Data Explorer plugin,...
Discourse Access Control Error Vulnerability (CNVD-2026-17484)
Discourse is Discourse open source set of open source community discussion platform. The platform includes features such as community , e-mail and chat rooms . Discourse suffers from an Access Control Error vulnerability that stems from a Chat::AddUsersToChannel add member that bypasses private...
BIT-DISCOURSE-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...
BIT-DISCOURSE-2026-28218 Discourse's Fail-Open Access Control in Data Explorer Plugin Allows Unauthorized SQL Query Execution
Discourse is an open source discussion platform. Prior to versions 2025.12.2, 2026.1.1, and 2026.2.0, fail-open access control in Data Explorer plugin allows any authenticated user to execute SQL queries that have no explicit group assignments, including built-in system queries. Versions 2025.12....
BIT-DISCOURSE-2026-27162 DIscourse doesn't prevent whispers to leak in excerpts
Discourse is an open source discussion platform. Prior to versions 2025.12.2, 2026.1.1, and 2026.2.0, postsnearby was checking topic access but then returning all posts regardless of type, including whispers that should only be visible to whisperers. Use Post.securedguardian to properly filter po...
BIT-DISCOURSE-2026-27153 Discourse doesn't prevent moderators from exporting user Chat DMs
Discourse is an open source discussion platform. Prior to versions 2025.12.2, 2026.1.1, and 2026.2.0, moderators could export user Chat DMs via the CSV export endpoint by exploiting an overly permissive allowlist in canexportentity?. The method allowed moderators to export any entity not explicit...
BIT-DISCOURSE-2026-27152 DIscourse has DM communication-preference bypass when adding members
Discourse is an open source discussion platform. Prior to versions 2025.12.2, 2026.1.1, and 2026.2.0, DM communication-preference bypass when adding members via Chat::AddUsersToChannel — a user could add targets who have blocked/ignored/muted them to an existing DM channel, bypassing per-recipien...
BIT-DISCOURSE-2026-27151 Discourse doesn't validate destination topic when moving posts
Discourse is an open source discussion platform. Prior to versions 2025.12.2, 2026.1.1, and 2026.2.0, the moveposts action only checked canmoveposts? on the source topic but never validated write permissions on the destination topic. This allowed TL4 users and category group moderators to move...
BIT-DISCOURSE-2026-27150 Discourse doesn't ensure guardian check when creating QueryGroupBookmark
Discourse is an open source discussion platform. Prior to versions 2025.12.2, 2026.1.1, and 2026.2.0, missing validatebeforecreate authorization in Data Explorer's QueryGroupBookmarkable allows any logged-in user to create bookmarks for query groups they don't have access to, enabling metadata...
BIT-DISCOURSE-2026-27149 Discourse has SQL injection in PM tag filtering
Discourse is an open source discussion platform. Prior to versions 2025.12.2, 2026.1.1, and 2026.2.0, SQL injection in PM tag filtering listprivatemessagestag allows bypassing tag filter conditions, potentially disclosing unauthorized private message metadata. Versions 2025.12.2, 2026.1.1, and...
BIT-DISCOURSE-2026-27021 Discourse: Poll voters endpoint lacked post visibility checks
Discourse is an open source discussion platform. Prior to versions 2025.12.2, 2026.1.1, and 2026.2.0, the voters endpoint in the poll plugin lacked post visibility checks which allowed unauthorized access to voters details of polls in any post. Versions 2025.12.2, 2026.1.1, and 2026.2.0 patch the...
BIT-DISCOURSE-2026-26979 Discourse: TL4 users are able to change status of restricted topics
Discourse is an open source discussion platform. Prior to versions 2025.12.2, 2026.1.1, and 2026.2.0, TL4 users are able to close, archive and pin topics in private categories they don't have access to. Versions 2025.12.2, 2026.1.1, and 2026.2.0 patch the issue. No known workarounds are available...
BIT-DISCOURSE-2026-26078 Discourse has authentication bypass vulnerability in the Patreon plugin webhook endpoint
Discourse is an open source discussion platform. Prior to versions 2025.12.2, 2026.1.1, and 2026.2.0, when the patreonwebhooksecret site setting is blank, an attacker can forge valid webhook signatures by computing an HMAC-MD5 with an empty string as the key. Since the request body is known to th...
CVE-2026-27152
Discourse is an open source discussion platform. Prior to versions 2025.12.2, 2026.1.1, and 2026.2.0, DM communication-preference bypass when adding members via Chat::AddUsersToChannel — a user could add targets who have blocked/ignored/muted them to an existing DM channel, bypassing per-recipien...
CVE-2026-27154
Discourse is an open source discussion platform. Prior to versions 2025.12.2, 2026.1.1, and 2026.2.0, a user full name can be evaluated as raw HTML when the following settings are set: displaynameonposts = true; and prioritizeusernameinux = false. Editing a post of a malicious user would trigger ...
CVE-2026-27150
Discourse is an open source discussion platform. Prior to versions 2025.12.2, 2026.1.1, and 2026.2.0, missing validatebeforecreate authorization in Data Explorer's QueryGroupBookmarkable allows any logged-in user to create bookmarks for query groups they don't have access to, enabling metadata...
CVE-2026-28219
Discourse is an open source discussion platform. Prior to versions 2025.12.2, 2026.1.1, and 2026.2.0, an improper authorization check in the topic management logic allows authenticated users to modify privileged attributes of their topics. By manipulating specific parameters in a PUT or POST...
CVE-2026-27153
Discourse is an open source discussion platform. Prior to versions 2025.12.2, 2026.1.1, and 2026.2.0, moderators could export user Chat DMs via the CSV export endpoint by exploiting an overly permissive allowlist in canexportentity?. The method allowed moderators to export any entity not explicit...