What is CVE-2021-29943?

CVE-2021-29943 is a critical-severity vulnerability in Apache Solr, classified under Incorrect Authorization. CVSS score: 9.1/10. Published 2021-04-13.

How severe is CVE-2021-29943?

Critical severity. CVSS v3 base score is 9.1 out of 10.

Is CVE-2021-29943 known to be exploited?

4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Auth bypass in Apache Solr

CVE-2021-29943

When using ConfigurableInternodeAuthHadoopPlugin for authentication, Apache Solr versions prior to 8.8.2 would forward/proxy distributed requests using server credentials instead of original client credentials. This would result in incorre…

Vulnerability class: Broken Access Control

EPSS: 0.053 (91.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.

Affected products

Apache Solr
Apache Software Foundation Solr — versions Apache Solr

Weakness classification (CWE)

CWE-863 — Incorrect Authorization

Public proof-of-concept exploits

References

security@apache.org (Mailing List, x_refsource_MISC, Vendor Advisory)
security@apache.org (x_refsource_CONFIRM, Third Party Advisory)

Frequently asked questions

What is CVE-2021-29943?: CVE-2021-29943 is a critical-severity vulnerability in Apache Solr, classified under Incorrect Authorization. CVSS score: 9.1/10. Published 2021-04-13.
How severe is CVE-2021-29943?: Critical severity. CVSS v3 base score is 9.1 out of 10.
Is CVE-2021-29943 known to be exploited?: 4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.