Vulnerability CVE-2019-15150
Published: 2019-08-19

Description:
In the OAuth2 Client extension before 0.4 for MediaWiki, a CSRF vulnerability exists due to the OAuth2 state parameter not being checked in the callback function.

See advisories in our WLB2 database:
Topic
Author
Date
Med.
MediaWiki OAuth2 Client 0.3 Cross Site Request Forgery
Justin Bull
20.08.2019

Type:

CWE-352

 (Cross-Site Request Forgery (CSRF))

CVSS2 => (AV:N/AC:M/Au:N/C:P/I:P/A:P)

CVSS Base Score
Impact Subscore
Exploitability Subscore
6.8/10
6.4/10
8.6/10
Exploit range
Attack complexity
Authentication
Remote
Medium
No required
Confidentiality impact
Integrity impact
Availability impact
Partial
Partial
Partial
Affected software
Schine.games -> Mw-oauth2client 

 References:
http://packetstormsecurity.com/files/154140/MediaWiki-OAuth2-Client-0.3-Cross-Site-Request-Forgery.html
http://seclists.org/fulldisclosure/2019/Aug/25
http://www.openwall.com/lists/oss-security/2019/08/19/1
https://github.com/Schine/MW-OAuth2Client/commit/6a4fe4500ddd72ad4e826d9d63b2d69512bd10d1
https://github.com/Schine/MW-OAuth2Client/releases/tag/v0.4
https://seclists.org/bugtraq/2019/Aug/32
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