CVE-2023-46241
Potential account take over due to unverified emails from Microsoft Identity Platform
discourse-microsoft-auth is a plugin that enables authentication via Microsoft. On sites with the discourse-microsoft-auth plugin enabled, an attack can potentially take control of a victim's Discourse account. Sites that have configured their application's account type to any options other than Accounts in this organizational directory only (O365 only - Single tenant) are vulnerable. This vulnerability has been patched in commit c40665f44509724b64938c85def9fb2e79f62ec8 of discourse-microsoft-auth. A microsoft_auth:revoke rake task has also been added which will deactivate and log out all users that have connected their accounts to Microsoft. User API keys as well as API keys created by those users will also be revoked. The rake task will also remove the connection records to Microsoft for those users. This will allow affected users to re-verify their account emails as well as reconnect their Discourse account to Microsoft for authentication. As a workaround, disable the discourse-microsoft-auth plugin by setting the microsoft_auth_enabled site setting to false. Run the microsoft_auth:log_out_users rake task to log out all users with associated Microsoft accounts.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- High
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used 9.1
Potential account take over due to unverified emails from Microsoft Identity Platform
discourse-microsoft-auth is a plugin that enables authentication via Microsoft. On sites with the discourse-microsoft-auth plugin enabled, an attack can potentially take control of a victim's Discourse account. Sites that have configured their application's account type to any options other than Accounts in this organizational directory only (O365 only - Single tenant) are vulnerable. This vulnerability has been patched in commit c40665f44509724b64938c85def9fb2e79f62ec8 of discourse-microsoft-auth. A microsoft_auth:revoke rake task has also been added which will deactivate and log out all users that have connected their accounts to Microsoft. User API keys as well as API keys created by those users will also be revoked. The rake task will also remove the connection records to Microsoft for those users. This will allow affected users to re-verify their account emails as well as reconnect their Discourse account to Microsoft for authentication. As a workaround, disable the discourse-microsoft-auth plugin by setting the microsoft_auth_enabled site setting to false. Run the microsoft_auth:log_out_users rake task to log out all users with associated Microsoft accounts.
- Record
CVE-2023-46241- CVSS 3.1
- 9.1 Critical
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H - Weakness
- CWE-863
- Updated
- 2026-11-02
EUVDEUVD-2023-50476 9.1
discourse-microsoft-auth is a plugin that enables authentication via Microsoft. On sites with the discourse-microsoft-auth plugin enabled, an attack can potentially take control of a victim's Discourse account. Sites that have configured their application's account type to any options other than Accounts in this organizational directory only (O365 only - Single tenant) are vulnerable. This vulnerability has been patched in commit c40665f44509724b64938c85def9fb2e79f62ec8 of discourse-microsoft-auth. A microsoft_auth:revoke rake task has also been added which will deactivate and log out all users that have connected their accounts to Microsoft. User API keys as well as API keys created by those users will also be revoked. The rake task will also remove the connection records to Microsoft for those users. This will allow affected users to re-verify their account emails as well as reconnect their Discourse account to Microsoft for authentication. As a workaround, disable the discourse-microsoft-auth plugin by setting the microsoft_auth_enabled site setting to false. Run the microsoft_auth:log_out_users rake task to log out all users with associated Microsoft accounts.
- Record
EUVD-2023-50476- CVSS 3.1
- 9.1 Critical
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H - Updated
- 2026-11-03
NVD 9.0
discourse-microsoft-auth is a plugin that enables authentication via Microsoft. On sites with the discourse-microsoft-auth plugin enabled, an attack can potentially take control of a victim's Discourse account. Sites that have configured their application's account type to any options other than Accounts in this organizational directory only (O365 only - Single tenant) are vulnerable. This vulnerability has been patched in commit c40665f44509724b64938c85def9fb2e79f62ec8 of discourse-microsoft-auth. A microsoft_auth:revoke rake task has also been added which will deactivate and log out all users that have connected their accounts to Microsoft. User API keys as well as API keys created by those users will also be revoked. The rake task will also remove the connection records to Microsoft for those users. This will allow affected users to re-verify their account emails as well as reconnect their Discourse account to Microsoft for authentication. As a workaround, disable the discourse-microsoft-auth plugin by setting the microsoft_auth_enabled site setting to false. Run the microsoft_auth:log_out_users rake task to log out all users with associated Microsoft accounts.
- Record
CVE-2023-46241- CVSS 3.1
- 9.0 Critical
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H - CVSS 3.1
- 8.1 High
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-863
- Updated
- 2026-11-02
OSV 9.0
Potential account take over due to unverified emails from Microsoft Identity Platform
discourse-microsoft-auth is a plugin that enables authentication via Microsoft. On sites with the discourse-microsoft-auth plugin enabled, an attack can potentially take control of a victim's Discourse account. Sites that have configured their application's account type to any options other than Accounts in this organizational directory only (O365 only - Single tenant) are vulnerable. This vulnerability has been patched in commit c40665f44509724b64938c85def9fb2e79f62ec8 of discourse-microsoft-auth. A microsoft_auth:revoke rake task has also been added which will deactivate and log out all users that have connected their accounts to Microsoft. User API keys as well as API keys created by those users will also be revoked. The rake task will also remove the connection records to Microsoft for those users. This will allow affected users to re-verify their account emails as well as reconnect their Discourse account to Microsoft for authentication. As a workaround, disable the discourse-microsoft-auth plugin by setting the microsoft_auth_enabled site setting to false. Run the microsoft_auth:log_out_users rake task to log out all users with associated Microsoft accounts.
- Record
CVE-2023-46241- CVSS 3.1
- 9.0 Critical
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H - Weakness
- CWE-863
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases, published | EUVD | |
| first indexed | CVE List, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2023-46241 is a critical vulnerability (CVSS 9.1) in Discourse, published February 21, 2024. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.80%, the 57th percentile. No source names a fixed version.
References
github.com/discourse/discourse-microsoft-auth/security/advisories/GHSA-2w32-w539-3m7r
github.com/discourse/discourse-microsoft-auth/commit/c40665f44509724b64938c85def9fb2e79f62ec8
learn.microsoft.com/en-us/security/zero-trust/develop/identity-supported-account-types
github.com/CVEProject/cvelistV5/tree/main/cves/2023/46xxx/CVE-2023-46241.json
nvd.nist.gov/vuln/detail/CVE-2023-46241