CVE-2025-68933— Discourse non-admin moderators can exfiltrate private content via post ownership transfer
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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: NVD (National Vulnerability Database)
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: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:H/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
授权机制不正确
Source: NVD (National Vulnerability Database)
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
II. Public POCs for CVE-2025-68933
| # | POC Description | Source Link | Shenlong Link |
|---|
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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
- CVE-2026-34947
Discourse: Staged user custom fields are exposed on public i - CVE-2026-27481
Discourse: Hidden tag visibility bypass on tag routes - CVE-2026-33415
Discourse: Improper Access Control in discourse-ai Allows Un - CVE-2026-33300
Discourse: Hidden group names and access metadata are expose - CVE-2026-33185
Discourse: Group SMTP test endpoint susceptible to SSRF
Same vendor: discourse
- CVE-2026-34947
Discourse: Staged user custom fields are exposed on public i - CVE-2026-27481
Discourse: Hidden tag visibility bypass on tag routes - CVE-2026-33415
Discourse: Improper Access Control in discourse-ai Allows Un - CVE-2026-33300
Discourse: Hidden group names and access metadata are expose - CVE-2026-33185
Discourse: Group SMTP test endpoint susceptible to SSRF
Same weakness: CWE-863
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Privilege Escalation Attack affecting Pelican Web UI - CVE-2025-15633
HCL BigFix WebUI is affected by an improper authorization vu - CVE-2026-42296
Argo Workflows has incomplete fix for CVE-2026-31892: hostNe - CVE-2025-66170
Apache CloudStack: Any user can list backups that they shoul - CVE-2026-41903
FreeScout IDOR Vulnerability: PERM_EDIT_USERS allows modifyi
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