CVE-2020-10686 Keycloak users may be able to remove MFA from other users' devices

What is CVE-2020-10686?

CVE-2020-10686 is a medium-severity missing authorization vulnerability in Redhat Keycloak, published on 4 May 2020. An attacker needs administrator access to exploit it, with no action from the victim.

Official description

A flaw was found in Keycloak version 8.0.2 and 9.0.0, and was fixed in Keycloak version 9.0.1, where a malicious user registers as oneself. The attacker could then use the remove devices form to post different credential IDs and possibly remove MFA devices for other users.

Weakness: CWE-285

Which versions are affected by CVE-2020-10686?

2 open source packages ship an affected version, including org.keycloak:keycloak-core. It affects 1 product.

Products include Redhat Keycloak.

How do I fix CVE-2020-10686?

Upgrade org.keycloak:keycloak-core to 9.0.2 or later.

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

Is CVE-2020-10686 being exploited?

There is no known exploitation of CVE-2020-10686 in the wild and no public exploit code.

Other vulnerabilities in Redhat Keycloak

• CVE-2022-4361 Keycloak vulnerable to cross-site scripting when validating URI-schemes on SAML and OIDC Critical 10.0
• CVE-2022-1245 Keycloak vulnerable to privilege escalation on Token Exchange feature Critical 9.8
• CVE-2021-20195 keycloak Self Stored Cross-site Scripting vulnerability Critical 9.6
• CVE-2019-14910 Keycloak Authentication Error Critical 9.3
• CVE-2019-14909 Keycloak Authentication Error Critical 9.3

All Redhat Keycloak vulnerabilities

Sources

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

Also known as GHSA-9695-w6h2-jpv9.