CVE-2021-28661 SilverStripe GraphQL Server permission checker not inherited by query subclass.

What is CVE-2021-28661?

CVE-2021-28661 is a medium-severity missing authorization vulnerability in Silverstripe Silverstripe, published on 7 Oct 2021. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

Default SilverStripe GraphQL Server (aka silverstripe/graphql) 3.x through 3.4.1 permission checker not inherited by query subclass.

Weakness: CWE-863

Which versions are affected by CVE-2021-28661?

3 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-2021-28661?

Upgrade silverstripe/graphql to 3.5.2 or later.

Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.

Is CVE-2021-28661 being exploited?

There is no known exploitation of CVE-2021-28661 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-2021-28661, GHSA-r7rh-g777-g5gx.