PT-2025-4771

Name of the Vulnerable Software and Affected Versions Discourse versions prior to the latest version Description Discourse is an open source platform for community discussion. In affected versions, an attacker can carefully craft a request with the right request headers to poison the anonymous...

Discourse 跨站脚本漏洞

Discourse is an open source community discussion platform from Discourse Open Source. The platform includes community, email, and chat room features. Discourse suffers from a cross-site scripting vulnerability that originates from an attacker being able to execute arbitrary JavaScript code on a...

PT-2025-4590

Name of the Vulnerable Software and Affected Versions Discourse versions prior to the latest version Description Discourse is an open source platform for community discussion. In affected versions, an attacker can execute arbitrary JavaScript on users' browsers by posting a malicious video...

PT-2025-3011

Name of the Vulnerable Software and Affected Versions Discourse versions prior to the latest version Description The issue affects users who disable chat in preferences but could still be reachable in some cases. The estimated number of potentially affected devices worldwide is not available. The...

CVE-2025-22602: Improper Neutralization of Input During Web Page Generation

Discourse is an open source platform for community discussion. In affected versions an attacker can execute arbitrary JavaScript on users' browsers by posting a malicious video placeholder html element. This issue only affects sites with CSP disabled. This problem has been patched in the latest...

CVE-2025-22601: Improper Limitation of a Pathname to a Restricted Directory

Discourse is an open source platform for community discussion. In affected versions an attacker can trick a target user to make changes to their own username via carefully crafted link using the activate-account route. This problem has been patched in the latest version of Discourse. Users are...

CVE-2024-55948: Origin Validation Error

Discourse is an open source platform for community discussion. In affected versions an attacker can make craft an XHR request to poison the anonymous cache for example, the cache may have a response with missing preloaded data. This issue only affects anonymous visitors of the site. This problem...

CVE-2024-53851: Uncontrolled Resource Consumption

Discourse is an open source platform for community discussion. In affected versions the endpoint for generating inline oneboxes for URLs wasn't enforcing limits on the number of URLs that it accepted, allowing a malicious user to inflict denial of service on some parts of the app. This...

CVE-2024-53994: Improper Preservation of Permissions

Discourse is an open source platform for community discussion. In affected versions users who disable chat in preferences could still be reachable in some cases. This problem has been patched in the latest version of Discourse. Users are advised to upgrade. Users unable to upgrade should disable...

CVE-2024-53266: Improper Neutralization of Input During Web Page Generation

Discourse is an open source platform for community discussion. In affected versions with some combinations of plugins, and with CSP disabled, activity streams in the user's profile page may be vulnerable to XSS. This has been patched in the latest version of Discourse core. Users are advised to...

CVE-2025-23023: Origin Validation Error

Discourse is an open source platform for community discussion. In affected versions an attacker can carefully craft a request with the right request headers to poison the anonymous cache for example, the cache may have a response with missing preloaded data. This issue only affects anonymous...

CVE-2024-56328: Improper Neutralization of Input During Web Page Generation

Discourse is an open source platform for community discussion. An attacker can execute arbitrary JavaScript on users' browsers by posting a maliciously crafted onebox url. This issue only affects sites with CSP disabled. This problem has been patched in the latest version of Discourse. Users are...

PT-2025-3200

Name of the Vulnerable Software and Affected Versions Discourse versions prior to the latest stable, beta, and tests-passed versions Description Discourse is an open source platform for community discussion. Private message titles and metadata can be read by other users when the "PM tags allowed...

CVE-2024-56197: Exposure of Sensitive Information to an Unauthorized Actor

Discourse is an open source platform for community discussion. PM titles and metadata can be read by other users when the "PM tags allowed for groups" option is enabled, the other user is a member of a group added to this option, and the PM has been tagged. This issue has been patched in the late...

PT-2025-3268

Name of the Vulnerable Software and Affected Versions Discourse affected versions not specified Description The issue allows an attacker to execute arbitrary JavaScript code in users' browsers by posting a maliciously crafted Onebox URL. This problem only affects sites with Content Security Polic...

Discourse 信息泄露漏洞

Discourse is an open source community discussion platform from Discourse Open Source. The platform includes features such as communities, email, and chat rooms. Discourse suffers from an information disclosure vulnerability that stems from the fact that when the option to allow PM tags for groups...

CVE-2024-54142

Discourse AI is a Discourse plugin which provides a number of AI features. When sharing Discourse AI Bot conversations into posts, if the conversation had HTML entities those could leak into the Discourse application when a user visited a post with a onebox to said conversation. This issue has be...

CVE-2024-54142

CVE-2024-54142 concerns the Discourse AI plugin for Discourse. When sharing Discourse AI Bot conversations into posts, HTML entities in the conversation could leak into the application when a user visits a post with a onebox, enabling cross-site scripting via user-visible content. The issue is ti...

CVE-2024-54142 Cross-site Scripting via Discourse-ai SharedAiConversation onebox in Discourse

Discourse AI is a Discourse plugin which provides a number of AI features. When sharing Discourse AI Bot conversations into posts, if the conversation had HTML entities those could leak into the Discourse application when a user visited a post with a onebox to said conversation. This issue has be...

CVE-2024-54142 Cross-site Scripting via Discourse-ai SharedAiConversation onebox in Discourse

Discourse AI is a Discourse plugin which provides a number of AI features. When sharing Discourse AI Bot conversations into posts, if the conversation had HTML entities those could leak into the Discourse application when a user visited a post with a onebox to said conversation. This issue has be...