Vulnerability Information
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Vulnerability Title
Discourse non-admin moderators can exfiltrate private content via post ownership transfer
Vulnerability Description
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 `moderators_change_post_ownership` setting enabled can change ownership of posts in private messages and restricted categories they cannot access, then export their data to view the content. This is a broken access control vulnerability affecting sites that grant moderators post ownership transfer permissions. This issue is patched in versions 3.5.4, 2025.11.2, 2025.12.1, and 2026.1.0. The patch adds visibility checks for both the topic and posts before allowing ownership transfer. As a workaround, disable the `moderators_change_post_ownership` site setting to prevent non-admin moderators from using the post ownership transfer feature.
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:H/A:N
Vulnerability Type
授权机制不正确
Vulnerability Title
Discourse 安全漏洞
Vulnerability Description
Discourse是Discourse开源的一套开源的社区讨论平台。该平台包括社区、电子邮件和聊天室等功能。 Discourse 3.5.4之前版本、2025.11.2之前版本、2025.12.1之前版本和2026.1.0之前版本存在安全漏洞，该漏洞源于启用了moderators_change_post_orship设置的非管理员版主可以更改其无法访问的私信和受限类别中的帖子所有权，可能导致访问控制不当。
CVSS Information
N/A
Vulnerability Type
N/A