CVE-2025-69218 Discourse moderators can access admin-only reports exposing private upload URLs

Discourse is an open source discussion platform. In versions prior to 3.5.4, 2025.11.2, 2025.12.1, and 2026.1.0, moderators can access the topuploads admin report which should be restricted to admins only. This report displays direct URLs to all uploaded files on the site, including sensitive...

CVE-2025-69218 Discourse moderators can access admin-only reports exposing private upload URLs

Discourse is an open source discussion platform. In versions prior to 3.5.4, 2025.11.2, 2025.12.1, and 2026.1.0, moderators can access the topuploads admin report which should be restricted to admins only. This report displays direct URLs to all uploaded files on the site, including sensitive...

CVE-2025-68934 Discourse Has Denial of Service (DoS) Vulnerability in Drafts Creation Endpoint

Discourse is an open source discussion platform. In versions prior to 3.5.4, 2025.11.2, 2025.12.1, and 2026.1.0, authenticated users can submit crafted payloads to /drafts.json that cause On^2 processing in Base62.decode, tying up workers for 35-60 seconds per request. This affects all users as t...

CVE-2025-68934 Discourse Has Denial of Service (DoS) Vulnerability in Drafts Creation Endpoint

Discourse is an open source discussion platform. In versions prior to 3.5.4, 2025.11.2, 2025.12.1, and 2026.1.0, authenticated users can submit crafted payloads to /drafts.json that cause On^2 processing in Base62.decode, tying up workers for 35-60 seconds per request. This affects all users as t...

EUVD-2025-206443

Discourse is an open source discussion platform. In versions prior to 3.5.4, 2025.11.2, 2025.12.1, and 2026.1.0, authenticated users can submit crafted payloads to /drafts.json that cause On^2 processing in Base62.decode, tying up workers for 35-60 seconds per request. This affects all users as t...

CVE-2025-68934

Discourse is an open source discussion platform. In versions prior to 3.5.4, 2025.11.2, 2025.12.1, and 2026.1.0, authenticated users can submit crafted payloads to /drafts.json that cause On^2 processing in Base62.decode, tying up workers for 35-60 seconds per request. This affects all users as t...

CVE-2025-68934 Discourse Has Denial of Service (DoS) Vulnerability in Drafts Creation Endpoint

Discourse is an open source discussion platform. In versions prior to 3.5.4, 2025.11.2, 2025.12.1, and 2026.1.0, authenticated users can submit crafted payloads to /drafts.json that cause On^2 processing in Base62.decode, tying up workers for 35-60 seconds per request. This affects all users as t...

CVE-2025-68934

Discourse has a DoS vulnerability (CVE-2025-68934) in the /drafts.json endpoint. Authenticated users can submit crafted payloads that trigger O(n^2) processing in Base62.decode, tying up workers for 35–60 seconds per request and exhausting the shared worker pool. Affected versions are prior to 3....

CVE-2025-68933 Discourse non-admin moderators can exfiltrate private content via post ownership transfer

Discourse is an open source discussion platform. In versions prior to 3.5.4, 2025.11.2, 2025.12.1, and 2026.1.0, non-admin moderators with the moderatorschangepostownership setting enabled can change ownership of posts in private messages and restricted categories they cannot access, then export...

EUVD-2025-206428

Discourse is an open source discussion platform. In versions prior to 3.5.4, 2025.11.2, 2025.12.1, and 2026.1.0, non-admin moderators with the moderatorschangepostownership setting enabled can change ownership of posts in private messages and restricted categories they cannot access, then export...

CVE-2025-68933

Discourse is an open source discussion platform. In versions prior to 3.5.4, 2025.11.2, 2025.12.1, and 2026.1.0, non-admin moderators with the moderatorschangepostownership setting enabled can change ownership of posts in private messages and restricted categories they cannot access, then export...

CVE-2025-68933 Discourse non-admin moderators can exfiltrate private content via post ownership transfer

Discourse is an open source discussion platform. In versions prior to 3.5.4, 2025.11.2, 2025.12.1, and 2026.1.0, non-admin moderators with the moderatorschangepostownership setting enabled can change ownership of posts in private messages and restricted categories they cannot access, then export...

CVE-2025-68933

CVE-2025-68933 (Discourse) is a broken access control vulnerability affecting Discourse versions prior to 3.5.4, 2025.11.2, 2025.12.1, and 2026.1.0. Non-admin moderators with the moderators_change_post_ownership setting enabled can change ownership of posts in private messages and restricted cate...

CVE-2025-68659

Discourse is an open source discussion platform. Versions prior to 3.5.4, 2025.11.2, 2025.12.1, and 2026.1.0 have an application level denial of service vulnerabilityin the username change functionality at try.discourse.org. The vulnerability allows attackers to cause noticeable server delays and...

CVE-2025-68479

Discourse is an open source discussion platform. In versions prior to 3.5.4, 2025.11.2, 2025.12.1, and 2026.1.0, some subscription endpoints lack proper checking for ownership before making changes. This issue is patched in versions 3.5.4, 2025.11.2, 2025.12.1, and 2026.1.0. No known workarounds...

CVE-2025-66488

Discourse is an open source discussion platform. A vulnerability present in versions prior to 3.5.4, 2025.11.2, 2025.12.1, and 2026.1.0 affects anyone who uses S3 for uploads. While scripts may be executed, they will only be run in the context of the S3/CDN domain, with no site credentials...

CVE-2025-67723

Discourse is an open source discussion platform. Versions prior to 3.5.4, 2025.11.2, 2025.12.1, and 2026.1.0 have a content-security-policy-mitigated cross-site scriptinv vulnerability on the Discourse Math plugin when using its KaTeX variant. This issue is patched in versions 3.5.4, 2025.11.2,...

CVE-2025-68666 Discourse users archives leaked to users with moderation privileges

Discourse is an open source discussion platform. In versions prior to 3.5.4, 2025.11.2, 2025.12.1, and 2026.1.0, users archives are viewable by users with moderation privileges even though moderators should not have access to the archives. Private topic/post content made by the users are leaked...

CVE-2025-68666 Discourse users archives leaked to users with moderation privileges

Discourse is an open source discussion platform. In versions prior to 3.5.4, 2025.11.2, 2025.12.1, and 2026.1.0, users archives are viewable by users with moderation privileges even though moderators should not have access to the archives. Private topic/post content made by the users are leaked...

EUVD-2025-206423

Discourse is an open source discussion platform. In versions prior to 3.5.4, 2025.11.2, 2025.12.1, and 2026.1.0, users archives are viewable by users with moderation privileges even though moderators should not have access to the archives. Private topic/post content made by the users are leaked...