BIT-DISCOURSE-2022-39378 Displaying user badges can leak topic titles to users that have no access to the topic

Discourse is a platform for community discussion. Under certain conditions, a user badge may have been awarded based on a user's activity in a topic with restricted access. Before this vulnerability was disclosed, the topic title of the topic associated with the user badge may be viewed by any...

BIT-DISCOURSE-2022-39385 Users erroneously and transparently added to private messages in Discourse

Discourse is the an open source discussion platform. In some rare cases users redeeming an invitation can be added as a participant to several private message topics that they should not be added to. They are not notified of this, it happens transparently in the background. This issue has been...

BIT-DISCOURSE-2022-41944 Discourse users can see notifications for topics they no longer have access to

Discourse is an open-source discussion platform. In stable versions prior to 2.8.12 and beta or tests-passed versions prior to 2.9.0.beta.13, under certain conditions, a user can see notifications for topics they no longer have access to. If there is sensitive information in the topic title, it...

BIT-DISCOURSE-2022-46148 Discourse allows self-XSS through malicious composer message

Discourse is an open-source messaging platform. In versions 2.8.10 and prior on the stable branch and versions 2.9.0.beta11 and prior on the beta and tests-passed branches, users composing malicious messages and navigating to drafts page could self-XSS. This vulnerability can lead to a full XSS o...

BIT-DISCOURSE-2022-46168 Group SMTP user emails are exposed in CC email header

Discourse is an option source discussion platform. Prior to version 2.8.14 on the stable branch and version 2.9.0.beta15 on the beta and tests-passed branches, recipients of a group SMTP email could see the email addresses of all other users inside the group SMTP topic. Most of the time this is n...

BIT-DISCOURSE-2022-46177 Discourse password reset link can lead to in account takeover if user changes to a new email

Discourse is an option source discussion platform. Prior to version 2.8.14 on the stable branch and version 3.0.0.beta16 on the beta and tests-passed branches, when a user requests for a password reset link email, then changes their primary email, the old reset email is still valid. When the old...

BIT-DISCOURSE-2023-22453 Discourse vulnerable to exposure of user post counts per topic to unauthorized users

Discourse is an option source discussion platform. Prior to version 2.8.14 on the stable branch and version 3.0.0.beta16 on the beta and tests-passed branches, the number of times a user posted in an arbitrary topic is exposed to unauthorized users through the /u/username.json endpoint. The issue...

BIT-DISCOURSE-2023-22454 Discourse vulnerable to Cross-site Scripting through pending post titles descriptions

Discourse is an option source discussion platform. Prior to version 2.8.14 on the stable branch and version 3.0.0.beta16 on the beta and tests-passed branches, pending post titles can be used for cross-site scripting attacks. Pending posts can be created by unprivileged users when a category has...

BIT-DISCOURSE-2023-22455 Discourse vulnerable to Cross-site Scripting through tag descriptions

Discourse is an option source discussion platform. Prior to version 2.8.14 on the stable branch and version 3.0.0.beta16 on the beta and tests-passed branches, tag descriptions, which can be updated by moderators, can be used for cross-site scripting attacks. This vulnerability can lead to a full...

BIT-DISCOURSE-2023-22468 Discourse vulnerable to Cross-site Scripting in local oneboxes

Discourse is an open source platform for community discussion. Versions prior to 2.8.13 stable, 3.0.0.beta16 beta and 3.0.0 tests-passed, are vulnerable to cross-site Scripting. A maliciously crafted URL can be included in a post to carry out cross-site scripting attacks on sites with disabled or...

BIT-DISCOURSE-2023-22739 Discourse subject to Allocation of Resources Without Limits or Throttling

Discourse is an open source platform for community discussion. Versions prior to 3.0.1 stable, 3.1.0.beta2 beta, and 3.1.0.beta2 tests-passed are subject to Allocation of Resources Without Limits or Throttling. As there is no limit on data contained in a draft, a malicious user can create an...

BIT-DISCOURSE-2023-22740 Discourse vulnerable to Allocation of Resources Without Limits via Chat drafts

Discourse is an open source platform for community discussion. Versions prior to 3.1.0.beta1 beta tests-passed are vulnerable to Allocation of Resources Without Limits. Users can create chat drafts of an unlimited length, which can cause a denial of service by generating an excessive load on the...

BIT-DISCOURSE-2023-23620 Discourse restricted tag routes leak topic information

Discourse is an open-source discussion platform. Prior to version 3.0.1 on the stable branch and 3.1.0.beta2 on the beta and tests-passed branches, the contents of latest/top routes for restricted tags can be accessed by unauthorized users. This issue is patched in version 3.0.1 on the stable...

BIT-DISCOURSE-2023-23622 Discourse: Presence of read restricted topics may be leaked if tagged with a tag that is visible to all users

Discourse is an open-source discussion platform. Prior to version 3.0.1 of the stable branch and version 3.1.0.beta2 of the beta and tests-passed branches, the count of topics displayed for a tag is a count of all regular topics regardless of whether the topic is in a read restricted category or...

BIT-DISCOURSE-2023-23624 Discourse's exclude_tags param could leak which topics had a specific hidden tag

Discourse is an open-source discussion platform. Prior to version 3.0.1 on the stable branch and version 3.1.0.beta2 on the beta and tests-passed branches, someone can use the excludetag param to filter out topics and deduce which ones were using a specific hidden tag. This affects any Discourse...

BIT-DISCOURSE-2023-23935 Presence of restricted personal Discourse messages may be leaked if tagged with a tag

Discourse is an open-source messaging platform. In versions 3.0.1 and prior on the stable branch and versions 3.1.0.beta2 and prior on the beta and tests-passed branches, the count of personal messages displayed for a tag is a count of all personal messages regardless of whether the personal...

BIT-DISCOURSE-2023-25167 Regular expression denial of service via installing themes via git in discourse

Discourse is an open source discussion platform. In affected versions a malicious user can cause a regular expression denial of service using a carefully crafted git URL. This issue is patched in the latest stable, beta and tests-passed versions of Discourse. Users are advised to upgrade. There a...

BIT-DISCOURSE-2023-25172 Discourse vulnerable to Cross-site Scripting - user name displayed on post

Discourse is an open-source discussion platform. Prior to version 3.0.1 of the stable branch and version 3.1.0.beta2 of the beta and tests-passed branches, a maliciously crafted URL can be included in a user's full name field to to carry out cross-site scripting attacks on sites with a disabled o...

BIT-DISCOURSE-2023-25819 Discourse tags with no visibility are leaking into og:article:tag

Discourse is an open source platform for community discussion. Tags that are normally private are showing in metadata. This affects any site running the tests-passed or beta branches = 3.1.0.beta2. The issue is patched in the latest beta and tests-passed version of Discourse...

BIT-DISCOURSE-2023-28111 Discourse vulnerable to SSRF protection bypass possible with IPv4-mapped IPv6 addresses

Discourse is an open-source discussion platform. Prior to version 3.1.0.beta3 of the beta and tests-passed branches, attackers are able to bypass Discourse's server-side request forgery SSRF protection for private IPv4 addresses by using a IPv4-mapped IPv6 address. The issue is patched in the...