BIT-DISCOURSE-2023-38684 Discourse vulnerable to ossible DDoS due to unbounded limits in various controller actions

Discourse is an open source discussion platform. Prior to version 3.0.6 of the stable branch and version 3.1.0.beta7 of the beta and tests-passed branches, in multiple controller actions, Discourse accepts limit params but does not impose any upper bound on the values being accepted. Without an...

BIT-DISCOURSE-2023-38685 Discourse's restricted tag information visible to unauthenticated users

Discourse is an open source discussion platform. Prior to version 3.0.6 of the stable branch and version 3.1.0.beta7 of the beta and tests-passed branches, information about restricted-visibility topic tags could be obtained by unauthorized users. The issue is patched in version 3.0.6 of the stab...

BIT-DISCOURSE-2023-38706 Discourse vulnerable to DoS via drafts

Discourse is an open-source discussion platform. Prior to version 3.1.1 of the stable branch, a malicious user can create an unlimited number of drafts with very long draft keys which may end up exhausting the resources on the server. The issue is patched in version 3.1.1 of the stable branch...

BIT-DISCOURSE-2023-40588 Discourse DoS via 2FA and Security Key Names

Discourse is an open-source discussion platform. Prior to version 3.1.1 of the stable branch and version 3.2.0.beta1 of the beta and tests-passed branches, a malicious user could add a 2FA or security key with a carefully crafted name to their account and cause a denial of service for other users...

BIT-DISCOURSE-2023-41042 Discourse DoS via remote theme assets

Discourse is an open-source discussion platform. Prior to version 3.1.1 of the stable branch and version 3.2.0.beta1 of the beta and tests-passed branches, importing a remote theme loads their assets into memory without enforcing limits for file size or number of files. The issue is patched in...

BIT-DISCOURSE-2023-41043 Discourse DoS via SvgSprite cache

Discourse is an open-source discussion platform. Prior to version 3.1.1 of the stable branch and version 3.2.0.beta1 of the beta and tests-passed branches, a malicious admin could create extremely large icons sprites, which would then be cached in each server process. This may cause server...

BIT-DISCOURSE-2023-43659 Cross-site Scripting via email preview when CSP disabled in Discourse

Discourse is an open source platform for community discussion. Improper escaping of user input allowed for Cross-site Scripting attacks via the digest email preview UI. This issue only affects sites with CSP disabled. This issue has been patched in the 3.1.1 stable release as well as the...

BIT-DISCOURSE-2023-43814 Exposure of poll options and votes to unauthorized users in Discourse

Discourse is an open source platform for community discussion. Attackers with details specific to a poll in a topic can use the /polls/groupedpollresults endpoint to view the content of options in the poll and the number of votes for groups of poll participants. This impacts private polls where t...

BIT-DISCOURSE-2023-44388 Malicious requests can fill up the log files resulting in a deinal of service in Discourse

Discourse is an open source platform for community discussion. A malicious request can cause production log files to quickly fill up and thus result in the server running out of disk space. This problem has been patched in the 3.1.1 stable and 3.2.0.beta2 versions of Discourse. It is possible to...

BIT-DISCOURSE-2023-44391 Prevent unauthorized access to summary details in Discourse

Discourse is an open source platform for community discussion. User summaries are accessible for anonymous users even when hideuserprofilesfrompublic is enabled. This problem has been patched in the 3.1.1 stable and 3.2.0.beta2 version of Discourse. Users are advised to upgrade. There are no know...

BIT-DISCOURSE-2023-45131 Unauthenticated access to new private chat messages in Discourse

Discourse is an open source platform for community discussion. New chat messages can be read by making an unauthenticated POST request to MessageBus. This issue is patched in the 3.1.1 stable and 3.2.0.beta2 versions of Discourse. Users are advised to upgrade. There are no known workarounds for...

BIT-DISCOURSE-2023-45806 Discourse vulnerable to DoS via Regexp Injection in Full Name

Discourse is an open source platform for community discussion. Prior to version 3.1.3 of the stable branch and version 3.2.0.beta3 of the beta and tests-passed branches, if a user has been quoted and uses a | in their full name, they might be able to trigger a bug that generates a lot of duplicat...

BIT-DISCOURSE-2023-45816 Unread bookmark reminder notifications that the user cannot access can be seen

Discourse is an open source platform for community discussion. Prior to version 3.1.3 of the stable branch and version 3.2.0.beta3 of the beta and tests-passed branches, there is an edge case where a bookmark reminder is sent and an unread notification is generated, but the underlying bookmarkabl...

BIT-DISCOURSE-2023-46130 Bypassing height value allowed in some theme components

Discourse is an open source platform for community discussion. Prior to version 3.1.3 of the stable branch and version 3.2.0.beta3 of the beta and tests-passed branches, some theme components allow users to add svgs with unlimited height attributes, and this can affect the availability of...

BIT-DISCOURSE-2023-47119 HTML injection in oneboxed links

Discourse is an open source platform for community discussion. Prior to version 3.1.3 of the stable branch and version 3.2.0.beta3 of the beta and tests-passed branches, some links can inject arbitrary HTML tags when rendered through our Onebox engine. The issue is patched in version 3.1.3 of the...

BIT-DISCOURSE-2023-47120 Discourse DoS through Onebox favicon URL

Discourse is an open source platform for community discussion. In versions 3.1.0 through 3.1.2 of the stable branch and versions 3.1.0,beta6 through 3.2.0.beta2 of the beta and tests-passed branches, Redis memory can be depleted by crafting a site with an abnormally long favicon URL and drafting...

BIT-DISCOURSE-2023-47121 Discourse SSRF vulnerability in Embedding

Discourse is an open source platform for community discussion. Prior to version 3.1.3 of the stable branch and version 3.2.0.beta3 of the beta and tests-passed branches, the embedding feature is susceptible to server side request forgery. The issue is patched in version 3.1.3 of the stable branch...

BIT-DISCOURSE-2023-48297 Discourse vulnerable to unlimited mentioned users in message serializer

Discourse is a platform for community discussion. The message serializer uses the full list of expanded chat mentions @all and @here which can lead to a very long array of users. This issue was patched in versions 3.1.4 and beta 3.2.0.beta5...

BIT-DISCOURSE-2023-49099 Discourse secure uploads accessible to guests even when login is required

Discourse is a platform for community discussion. Under very specific circumstances, secure upload URLs associated with posts can be accessed by guest users even when login is required. This vulnerability has been patched in 3.2.0.beta4 and 3.1.4...

BIT-DISCOURSE-2024-21655 Insufficient control of custom field value sizes

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...