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CVE-2019-15150

28
FAUCET Score

CVE-2019-15150 is a Cross-Site Request Forgery (CSRF) vulnerability in the OAuth2 Client extension for MediaWiki, affecting versions prior to 0.4. This flaw stems from the extension's failure to properly validate the OAuth2 state parameter in its callback function. With a CVSS score of 8.8 (High), an unauthenticated attacker could exploit this vulnerability remotely with low attack complexity, potentially leading to high impact on confidentiality, integrity, and availability. There is currently no evidence of active exploitation, no public exploit code available (e.g., Metasploit, Nuclei, ExploitDB), and minimal community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 0.4CPE matchmatch criteria
cpe:2.3:a:schine.games:mw-oauth2client:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

8.8HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.16%
Probability of exploitation in next 30 days
EPSS Percentile
64.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0116 is in the 63rd percentile among its peer group of 14,848 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.1 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference
View patch

References

packetstormsecurity.com / files/154140/MediaWiki-OAuth2-Client-0.3-Cross-Site-Request-Forgery.html
Third Party AdvisoryVDB Entry
seclists.org / fulldisclosure/2019/Aug/25
Mailing ListThird Party Advisory
github.com / Schine/MW-OAuth2Client/commit/6a4fe4500ddd72ad4e826d9d63b2d69512bd10d1
Patch
github.com / Schine/MW-OAuth2Client/releases/tag/v0.4
Release Notes
seclists.org / bugtraq/2019/Aug/32
Mailing ListThird Party Advisory
openwall.com / lists/oss-security/2019/08/19/1
Mailing ListThird Party Advisory