CVE-2025-58055 Discourse AI Suggestions Contain Insecure Direct Object Reference

Discourse is an open-source community discussion platform. In versions 3.5.0 and below, the Discourse AI suggestion endpoints for topic “Title”, “Category”, and “Tags” allowed authenticated users to extract information about topics that they weren’t authorized to access. By modifying the “topicid...

CVE-2025-58055 Discourse AI Suggestions Contain Insecure Direct Object Reference

Discourse is an open-source community discussion platform. In versions 3.5.0 and below, the Discourse AI suggestion endpoints for topic “Title”, “Category”, and “Tags” allowed authenticated users to extract information about topics that they weren’t authorized to access. By modifying the “topicid...

CVE-2025-58054 Discourse is vulnerable to XSS when quoting chat messages

Discourse is an open-source community discussion platform. Versions 3.5.0 and below are vulnerable to XSS attacks through parsing and rendering of chat channel titles and chat thread titles via the quote message functionality when using the rich text editor. This issue is fixed in version 3.5.1...

PT-2025-40289

Name of the Vulnerable Software and Affected Versions Discourse versions 3.5.0 and below Description Discourse, an open-source community discussion platform, had an issue where authenticated users could access information about topics they were not authorized to view. This occurred through the AI...

CVE-2025-54411

Discourse is an open-source discussion platform. Welcome banner user name string for logged in users can be vulnerable to XSS attacks, which affect the user themselves or an admin impersonating them. Admins can temporarily alter the welcomebanner.header.loggedinmembers site text to remove the...

BIT-DISCOURSE-2025-53102 Discourse's WebAuthn challenge isn't cleared from user session after authentication

Discourse is an open-source community discussion platform. Prior to version 3.4.7 on the stable branch and version 3.5.0.beta.8 on the tests-passed branch, upon issuing a physical security key for 2FA, the server generates a WebAuthn challenge, which the client signs. The challenge is not cleared...

CVE-2025-53102

Discourse is an open-source community discussion platform. Prior to version 3.4.7 on the stable branch and version 3.5.0.beta.8 on the tests-passed branch, upon issuing a physical security key for 2FA, the server generates a WebAuthn challenge, which the client signs. The challenge is not cleared...

CVE-2025-53102 Discourse's WebAuthn challenge isn't cleared from user session after authentication

Discourse is an open-source community discussion platform. Prior to version 3.4.7 on the stable branch and version 3.5.0.beta.8 on the tests-passed branch, upon issuing a physical security key for 2FA, the server generates a WebAuthn challenge, which the client signs. The challenge is not cleared...

CVE-2025-49845

Discourse is an open-source discussion platform. The visibility of posts typed whisper is controlled via the whispersallowedgroups site setting. Only users that belong to groups specified in the site setting are allowed to view posts typed whisper. However, it has been discovered that users of...

CVE-2025-49845 Discourse users are able to see their own whispers even after being removed from a group that has been configured to see whispers

Discourse is an open-source discussion platform. The visibility of posts typed whisper is controlled via the whispersallowedgroups site setting. Only users that belong to groups specified in the site setting are allowed to view posts typed whisper. However, it has been discovered that users of...

CVE-2025-48954 Discourse vulnerable to XSS via user-provided query parameter in oauth failure flow

Discourse is an open-source discussion platform. Versions prior to 3.5.0.beta6 are vulnerable to cross-site scripting when the content security policy isn't enabled when using social logins. Version 3.5.0.beta6 patches the issue. As a workaround, have the content security policy enabled...

CVE-2025-48053

Discourse is an open-source discussion platform. Prior to version 3.4.4 of the stable branch, version 3.5.0.beta5 of the beta branch, and version 3.5.0.beta6-dev of the tests-passed branch, sending a malicious URL in a PM to a bot user can cause a reduced the availability of a Discourse instance...

CVE-2025-48062

Discourse is an open-source discussion platform. Prior to version 3.4.4 of the stable branch, version 3.5.0.beta5 of the beta branch, and version 3.5.0.beta6-dev of the tests-passed branch, certain invites via email may result in HTML injection in the email body if the topic title includes HTML...

CVE-2025-48053

Discourse is an open-source discussion platform. Prior to version 3.4.4 of the stable branch, version 3.5.0.beta5 of the beta branch, and version 3.5.0.beta6-dev of the tests-passed branch, sending a malicious URL in a PM to a bot user can cause a reduced the availability of a Discourse instance...

CVE-2025-48062

Technical details about CVE-2025-48062 are not publicly disclosed in the provided documents. Monitor for updates from official sources.

CVE-2024-47772

Discourse is an open source platform for community discussion. An attacker can execute arbitrary JavaScript on users' browsers by sending a maliciously crafted chat message and replying to it. This issue only affects sites with CSP disabled. This problem is patched in the latest version of...

CVE-2024-21655

Discourse is a platform for community discussion. For fields that are client editable, limits on sizes are not imposed. This allows a malicious actor to cause a Discourse instance to use excessive disk space and also often excessive bandwidth. The issue is patched 3.1.4 and 3.2.0.beta4...

CVE-2024-23834

Discourse is an open-source discussion platform. Improperly sanitized user input could lead to an XSS vulnerability in some situations. This vulnerability only affects Discourse instances which have disabled the default Content Security Policy. The vulnerability is patched in 3.1.5 and 3.2.0.beta...

CVE-2024-27100

Discourse is an open source platform for community discussion. In affected versions the endpoints for suspending users, silencing users and exporting CSV files weren't enforcing limits on the sizes of the parameters that they accept. This could lead to excessive resource consumption which could...

CVE-2023-28440

Discourse is an open source platform for community discussion. In affected versions a maliciously crafted request from a Discourse administrator can lead to a long-running request and eventual timeout. This has the greatest potential impact in shared hosting environments where admins are untruste...