CVE-2020-26136 Authentication bypass in SilverStripe GraphQL

What is CVE-2020-26136?

CVE-2020-26136 is a medium-severity authentication bypass vulnerability in Silverstripe Silverstripe, published on 8 Jun 2021. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

In SilverStripe through 4.6.0-rc1, GraphQL doesn't honour MFA (multi-factor authentication) when using basic authentication.

Weakness: CWE-287

Which versions are affected by CVE-2020-26136?

5 open source packages ship an affected version, including silverstripe/graphql and silverstripe. It affects 1 product.

Products include Silverstripe Silverstripe.

How do I fix CVE-2020-26136?

Upgrade silverstripe/graphql to a fixed version for your release line: 3.5.0 or 4.0.0-alpha2.

Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.

Is CVE-2020-26136 being exploited?

There is no known exploitation of CVE-2020-26136 in the wild and no public exploit code.

Other vulnerabilities in Silverstripe Silverstripe

• CVE-2007-2321 Other in n/a Critical 10.0
• CVE-2019-12204 Missing warning can lead to unauthenticated admin access in SilverStripe Critical 9.8
• CVE-2019-5715 Silverstripe Framework SQLi Vulnerability Critical 9.8
• CVE-2019-12437 Silverstripe CSRF Protection Bypass via GraphQL High 8.8
• CVE-2020-6164 Silverstripe CMS information disclosure High 7.5

All Silverstripe Silverstripe vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as BIT-silverstripe-2020-26136, GHSA-mg2g-8pwj-r2j2.