CVE-2020-13957: Apache Solr

Critical severity, CVSS 9.8. EPSS: 79.3% chance of exploitation in the next 30 days.

Apache Solr versions 6.6.0 to 6.6.6, 7.0.0 to 7.7.3 and 8.0.0 to 8.6.2 prevents some features considered dangerous (which could be used for remote code execution) to be configured in a ConfigSet that's uploaded via API without authentication/authorization. The checks in place to prevent such features can be circumvented by using a combination of UPLOAD/CREATE actions.

Affected products

• Apache Solr: from 6.6.0, up to and including 6.6.6; from 7.0.0, up to and including 7.7.3; from 8.0.0, up to and including 8.6.2

Published 2020-10-13. Last modified 2026-06-17.