CVE-2019-15150
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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.16%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 8.8 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- EPSS
- 1.16% probability · 67th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-352
- Affected
- schine.games/mw-oauth2client
- Source
- cve@mitre.org
EPSS 1.2% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://packetstormsecurity.com/files/154140/MediaWiki-OAuth2-Client-0.3-Cross-Site-Request-Forgery.htmlThird Party Advisory, VDB Entry
- http://seclists.org/fulldisclosure/2019/Aug/25Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2019/08/19/1Mailing List, Third Party Advisory
- https://github.com/Schine/MW-OAuth2Client/commit/6a4fe4500ddd72ad4e826d9d63b2d69512bd10d1Patch
- https://github.com/Schine/MW-OAuth2Client/releases/tag/v0.4Release Notes
- https://seclists.org/bugtraq/2019/Aug/32Mailing List, Third Party Advisory
- http://packetstormsecurity.com/files/154140/MediaWiki-OAuth2-Client-0.3-Cross-Site-Request-Forgery.htmlThird Party Advisory, VDB Entry
- http://seclists.org/fulldisclosure/2019/Aug/25Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2019/08/19/1Mailing List, Third Party Advisory
- https://github.com/Schine/MW-OAuth2Client/commit/6a4fe4500ddd72ad4e826d9d63b2d69512bd10d1Patch
- https://github.com/Schine/MW-OAuth2Client/releases/tag/v0.4Release Notes
- https://seclists.org/bugtraq/2019/Aug/32Mailing List, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.