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

Quick assessment

Affected
discourse discourse
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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 6.9 · Medium EPSS 0.14% · P3

Possible ATT&CK Techniques 1 AI

T1078 · Valid Accounts
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I. Basic Information for CVE-2025-68933

Vulnerability Information
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Vulnerability Title
Discourse non-admin moderators can exfiltrate private content via post ownership transfer
Source: CVE Program / CVE List V5
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制不正确
Source: CVE Program / CVE List V5
Vulnerability Title
Discourse 安全漏洞
Source: CNNVD (China National Vulnerability Database)
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。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
discourse discourse < 3.5.4 -

II. Public POCs for CVE-2025-68933

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III. Intelligence Information for CVE-2025-68933

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Same Patch Batch · discourse · 2026-01-28 · 14 CVEs total

CVE-2025-68662 7.6 HIGH FinalDestination hostname matching allows SSRF protection bypass
CVE-2025-68479 7.1 HIGH Discourse subscriptions are susceptible to takeover
CVE-2026-24742 6.5 MEDIUM Discourse staff action logs expose sensitive information to moderators
CVE-2026-21865 6.5 MEDIUM Discourse topic conversion permission vulnerability for moderators
CVE-2025-68934 6.5 MEDIUM Discourse Has Denial of Service (DoS) Vulnerability in Drafts Creation Endpoint
CVE-2025-67723 4.6 MEDIUM Discourse vulnerable to stored Cross-site Scripting via Katex in discourse-math plugin
CVE-2025-66488 4.6 MEDIUM Discourse allows script execution in uploaded HTML/XML files on S3
CVE-2025-68659 4.3 MEDIUM Discourse has DoS vulnerability in username change endpoint
CVE-2026-23743 Discourse allows permalinks to restricted resources to leak resource slugs to unauthorized
CVE-2025-69289 Discourse has insecure default configuration that allows non-admin moderators to takeover
CVE-2025-69218 Discourse moderators can access admin-only reports exposing private upload URLs
CVE-2025-68666 Discourse users archives leaked to users with moderation privileges
CVE-2025-68660 Discourse AI Discover's continue conversation allows threat actor to impersonate user

IV. Related Vulnerabilities

Same product: discourse
Same vendor: discourse
Same weakness: CWE-863

V. Comments for CVE-2025-68933

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