CVE-2024-53851 Partial denial of service via inline oneboxes in Discourse

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-2024-53851 Partial denial of service via inline oneboxes in Discourse

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-2024-53851

CVE-2024-53851 affects Discourse: an issue in the endpoint that generates inline oneboxes for URLs did not enforce limits on accepted URLs, enabling authenticated users to trigger denial of service in parts of the app. The vulnerability is mitigated by upgrading to the latest stable, beta, or tes...

CVE-2024-53851 Partial denial of service via inline oneboxes in Discourse

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-2025-23023

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-2025-22601

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-2024-56197

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...

CVE-2025-22602

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-2024-55948

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-2024-56328

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...

CVE-2024-53994 Potential bypass of chat permissions in Discourse

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-2024-53994 Potential bypass of chat permissions in Discourse

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-2024-53994 Potential bypass of chat permissions in Discourse

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-2024-53994

CVE-2024-53994 affects the Discourse platform. In affected versions, users who disable chat in preferences could still be reachable in some cases. The issue has been patched in the latest Discourse release; users should upgrade. If upgrading is not possible, disable the chat plugin via site setti...

CVE-2024-55948

CVE-2024-55948 describes an anonymous cache poisoning vulnerability in Discourse. In affected versions, an attacker can craft an XHR request to contaminate the anonymous cache, potentially causing a response with missing preloaded data and affecting only anonymous visitors. Mitigation in the prov...

CVE-2024-55948 Anonymous cache poisoning via XHR requests in Discourse

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-2024-55948 Anonymous cache poisoning via XHR requests in Discourse

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-2024-55948 Anonymous cache poisoning via XHR requests in Discourse

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-2024-56197

CVE-2024-56197 affects Discourse: when the PM tags allowed for groups option is enabled, and a recipient belongs to a group listed in that option with the PM tagged, other users can read PM titles and metadata. The issue is described across multiple sources as an information-disclosure risk withi...

CVE-2024-56197 Users can see other user's tagged PMs in Discourse

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...