CVE-2019-15150 — In the OAuth2 Client extension before 0

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.

01What is this vulnerability?

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.

02Affected products

Vendor	Product	Versions
n	a / n/a	n/a

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2019-08-19T03:41:04.000Z
• Last modified: 2024-08-05T00:42:00.718Z

09References

• github.com — https://github.com/Schine/MW-OAuth2Client/commit/6a4fe4500ddd72ad4e826d9d63b2d69…
• github.com — https://github.com/Schine/MW-OAuth2Client/releases/tag/v0.4
• www.openwall.com — http://www.openwall.com/lists/oss-security/2019/08/19/1
• seclists.org — https://seclists.org/bugtraq/2019/Aug/32
• packetstormsecurity.com — http://packetstormsecurity.com/files/154140/MediaWiki-OAuth2-Client-0.3-Cross-Si…
• seclists.org — http://seclists.org/fulldisclosure/2019/Aug/25