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...

BIT-DISCOURSE-2023-28112 Discourse's SSRF protection missing for some FastImage requests

Discourse is an open-source discussion platform. Prior to version 3.1.0, some user provided URLs were being passed to FastImage without SSRF protection. Insufficient protections could enable attackers to trigger outbound network connections from the Discourse server to private IP addresses. This...

BIT-DISCOURSE-2023-29196 HTML injection via topic embedding in Discourse

Discourse is an open source platform for community discussion. This vulnerability is not exploitable on the default install of Discourse. A custom feature must be enabled for it to work at all, and the attacker’s payload must pass the CSP to be executed. However, if an attacker succeeds in...

BIT-DISCOURSE-2023-30606 Multisite denial of service through unsanitized dynamic dispatch to SiteSetting in Discourse

Discourse is an open source platform for community discussion. In affected versions a user logged as an administrator can call arbitrary methods on the SiteSetting class, notably clearcache! and notifychanged!, which when done on a multisite instance, can affect the entire cluster resulting in a...

BIT-DISCOURSE-2023-31142 Discourse's general category permissions could be set back to default

Discourse is an open source discussion platform. Prior to version 3.0.4 of the stable branch and version 3.1.0.beta5 of the beta and tests-passed branches, if a site has modified their general category permissions, they could be set back to the default. This issue is patched in version 3.0.4 of t...

BIT-DISCOURSE-2023-36466 Topic Title Validation Skipped When Changing Category in Discourse

Discourse is an open source discussion platform. When editing a topic, there is a vulnerability that enables a user to bypass the topic title validations for things like title length, number of emojis in title and blank topic titles. The issue is patched in the latest stable, beta and tests-passe...

BIT-DISCOURSE-2023-36473 CSP nonce reuse vulnerability in Discourse

Discourse is an open source discussion platform. A CSP Content Security Policy nonce reuse vulnerability could allow XSS attacks to bypass CSP protection. There are no known XSS vectors at the moment, but should one be discovered, this vulnerability would allow the XSS attack to completely bypass...

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-2023-43814 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...