CVE-2022-36068

Discourse is an open source discussion platform. In versions prior to 2.8.9 on the stable branch and prior to 2.9.0.beta10 on the beta and tests-passed branches, a moderator can create new and edit existing themes by using the API when they should not be able to do so. The problem is patched in ver...

CVE-2023-37904

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, more users than permitted could be created from invite links. The issue is patched in version 3.0.6 of the stable branch and version 3.1.0.beta...

CVE-2023-23935

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 messag...

CVE-2023-38685

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 stable...

CVE-2023-23622

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 no...

CVE-2022-24782

Discourse is an open source discussion platform. Versions 2.8.2 and prior in the stable branch, 2.9.0.beta3 and prior in the beta branch, and 2.9.0.beta3 and prior in the tests-passed branch are vulnerable to a data leak. Users can request an export of their own activity. Sometimes, due to category...

CVE-2023-43659

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 3.2.0.beta...

CVE-2021-3138

In Discourse 2.7.0 through beta1, a rate-limit bypass leads to a bypass of the 2FA requirement for certain forms.

CVE-2022-24804

Discourse is an open source platform for community discussion. In stable versions prior to 2.8.3 and beta versions prior 2.9.0.beta4 erroneously expose groups. When a group with restricted visibility has been used to set the permissions of a category, the name of the group is leaked to any user tha...

CVE-2023-45131

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 thi...

CVE-2023-28111

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 lat...

CVE-2022-24824

Discourse is an open source platform for community discussion. In affected versions an attacker can poison the cache for anonymous (i.e. not logged in) users, such that the users are shown the crawler view of the site instead of the HTML page. This can lead to a partial denial-of-service. This issu...

CVE-2023-38498

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, a malicious user can prevent the defer queue from proceeding promptly on sites hosted in the same multisite installation. The issue is patched ...

CVE-2023-46241

discourse-microsoft-auth is a plugin that enables authentication via Microsoft. On sites with the discourse-microsoft-auth plugin enabled, an attack can potentially take control of a victim's Discourse account. Sites that have configured their application's account type to any options other than Ac...

CVE-2023-43814

Discourse is an open source platform for community discussion. Attackers with details specific to a poll in a topic can use the /polls/grouped_poll_results 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...

CVE-2022-23641

Discourse is an open source discussion platform. In versions prior to 2.8.1 in the stable branch, 2.9.0.beta2 in the beta branch, and 2.9.0.beta2 in the tests-passed branch, users can trigger a Denial of Service attack by posting a streaming URL. Parsing Oneboxes in the background job trigger an in...

CVE-2021-41095

Discourse is an open source discussion platform. There is a cross-site scripting (XSS) vulnerability in versions 2.7.7 and earlier of the stable branch, versions 2.8.0.beta6 and earlier of the beta branch, and versions 2.8.0.beta6 and earlier of the tests-passed branch. Rendering of some error mess...

CVE-2022-31025

Discourse is an open source platform for community discussion. Prior to version 2.8.4 on the stable branch and 2.9.0beta5 on the beta and tests-passed branches, inviting users on sites that use single sign-on could bypass the must_approve_users check and invites by staff are always approved automat...

CVE-2022-31182

Discourse is the an open source discussion platform. In affected versions a maliciously crafted request for static assets could cause error responses to be cached by Discourse's default NGINX proxy configuration. A corrected NGINX configuration is included in the latest stable, beta and tests-passe...

CVE-2022-21677

Discourse is an open source discussion platform. Discourse groups can be configured with varying visibility levels for the group as well as the group members. By default, a newly created group has its visibility set to public and the group's members visibility set to public as well. However, a grou...

CVE-2022-24850

Discourse is an open source platform for community discussion. A category's group permissions settings can be viewed by anyone that has access to the category. As a result, a normal user is able to see whether a group has read/write permissions in the category even though the information should onl...

CVE-2022-31060

Discourse is an open-source discussion platform. Prior to version 2.8.4 in the stable branch and version 2.9.0.beta5 in the beta and tests-passed branches, banner topic data is exposed on login-required sites. This issue is patched in version 2.8.4 in the stable branch and version 2.9.0.beta5 in th...

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 ren...

CVE-2022-21678

Discourse is an open source discussion platform. Prior to version 2.8.0.beta11 in the tests-passed branch, version 2.8.0.beta11 in the beta branch, and version 2.7.13 in the stable branch, the bios of users who made their profiles private were still visible in the tags on their users' pages. The p...

CVE-2022-31096

Discourse is an open source discussion platform. Under certain conditions, a logged in user can redeem an invite with an email that either doesn't match the invite's email or does not adhere to the email domain restriction of an invite link. The impact of this flaw is aggravated when the invite has...

CVE-2024-24827

Discourse is an open source platform for community discussion. Without a rate limit on the POST /uploads endpoint, it makes it easier for an attacker to carry out a DoS attack on the server since creating an upload can be a resource intensive process. Do note that the impact varies from site to sit...

CVE-2021-41163

Discourse is an open source platform for community discussion. In affected versions maliciously crafted requests could lead to remote code execution. This resulted from a lack of validation in subscribe_url values. This issue is patched in the latest stable, beta and tests-passed versions of Discou...

CVE-2024-24748

Discourse is an open source platform for community discussion. In affected versions an attacker can learn that a secret subcategory exists under a public category which has no public subcategories. The issue is patched in the latest stable, beta and tests-passed version of Discourse. Users are advi...

CVE-2021-32764

Discourse is an open-source discussion platform. In Discourse versions 2.7.5 and prior, parsing and rendering of YouTube Oneboxes can be susceptible to XSS attacks. This vulnerability only affects sites which have modified or disabled Discourse's default Content Security Policy. The issue is patche...

CVE-2021-32788

Discourse is an open source discussion platform. In versions prior to 2.7.7 there are two bugs which led to the post creator of a whisper post being revealed to non-staff users. 1: Staff users that creates a whisper post in a personal message is revealed to non-staff participants of the personal me...

CVE-2024-28242

Discourse is an open source platform for community discussion. In affected versions an attacker can learn that secret categories exist when they have backgrounds set. The issue is patched in the latest stable, beta and tests-passed version of Discourse. Users are advised to upgrade. Users unable to...

CVE-2022-21642

Discourse is an open source platform for community discussion. In affected versions when composing a message from topic the composer user suggestions reveals whisper participants. The issue has been patched in stable version 2.7.13 and beta version 2.8.0.beta11. There is no workaround for this issu...

CVE-2022-41944

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 wil...

CVE-2022-21684

Discourse is an open source discussion platform. Versions prior to 2.7.13 in stable, 2.8.0.beta11 in beta, and 2.8.0.beta11 in tests-passed allow some users to log in to a community before they should be able to do so. A user invited via email to a forum with must_approve_users enabled is going to ...

CVE-2023-23620

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 branc...

CVE-2023-23624

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 exclude_tag param to filter out topics and deduce which ones were using a specific hidden tag. This affects any Discourse s...

CVE-2022-39356

Discourse is a platform for community discussion. Users who receive an invitation link that is not scoped to a single email address can enter any non-admin user's email and gain access to their account when accepting the invitation. All users should upgrade to the latest version. A workaround is te...

CVE-2021-37633

Discourse is an open source discussion platform. In versions prior to 2.7.8 rendering of d-popover tooltips can be susceptible to XSS attacks. This vulnerability only affects sites which have modified or disabled Discourse's default Content Security Policy. This issue is patched in the latest stabl...

CVE-2022-31184

Discourse is the an open source discussion platform. In affected versions an email activation route can be abused to send mass spam emails. A fix has been included in the latest stable, beta and tests-passed versions of Discourse which rate limits emails. Users are advised to upgrade. Users unable ...

CVE-2022-36066

Discourse is an open source discussion platform. In versions prior to 2.8.9 on the stable branch and prior to 2.9.0.beta10 on the beta and tests-passed branches, admins can upload a maliciously crafted Zip or Gzip Tar archive to write files at arbitrary locations and trigger remote code execution. ...

CVE-2023-23621

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, a malicious user can cause a regular expression denial of service using a carefully crafted user agent. This issue is patched in version 3.0.1 ...

CVE-2022-46148

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 on ...

CVE-2022-46159

Discourse is an open-source discussion platform. In version 2.8.13 and prior on the stable branch and version 2.9.0.beta14 and prior on the beta and tests-passed branches, any authenticated user can create an unlisted topic. These topics, which are not readily available to other users, can take up ...

CVE-2023-23616

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, when submitting a membership request, there is no character limit for the reason provided with the request. This could potentially allow a user to floo...

CVE-2019-1020018

Discourse before 2.3.0 and 2.4.x before 2.4.0.beta3 lacks a confirmation screen when logging in via an email link.

CVE-2024-53991

Discourse is an open source platform for community discussion. This vulnerability only impacts Discourse instances configured to use FileStore::LocalStore which means uploads and backups are stored locally on disk. If an attacker knows the name of the Discourse backup file, the attacker can trick n...

CVE-2022-37458

Discourse through 2.8.7 allows admins to send invitations to arbitrary email addresses at an unlimited rate.

CVE-2024-27085

Discourse is an open source platform for community discussion. In affected versions users that are allowed to invite others can inject arbitrarily large data in parameters used in the invite route. The problem has been patched in the latest version of Discourse. Users are advised to upgrade. Users ...

CVE-2023-25819

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.

CVE-2021-37703

Discourse is an open-source platform for community discussion. In Discourse before versions 2.7.8 and 2.8.0.beta5, a user's read state for a topic such as the last read post number and the notification level is exposed.