CVE-2021-29943

Name: CVE-2021-29943
Creator: NVD / NIST
Published: 2021-04-13T07:15:12.403+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.1/10EPSS 5.26%

Last modified Jun 17, 2026

CVE-2021-29943 is a critical-severity vulnerability rated 9.1/10 on the CVSS scale. 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 incorrect authorization resolution on the receiving hosts.. EPSS estimates a 5.26% chance of exploitation in the next 30 days.

Description

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 incorrect authorization resolution on the receiving hosts.

Metrics

CVSS 3.1

9.1/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

EPSS Probability

5.26%

91.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Apache	Solr	< 8.8.2

References

https://lists.apache.org/thread.html/r91dd0ff556e0c9aab4c92852e0e540c59d4633718ce12881558cf44d%40%3Cusers.solr.apache.org%3EMailing List, Vendor Advisory
https://security.netapp.com/advisory/ntap-20210604-0009/Third Party Advisory
https://lists.apache.org/thread.html/r91dd0ff556e0c9aab4c92852e0e540c59d4633718ce12881558cf44d%40%3Cusers.solr.apache.org%3EMailing List, Vendor Advisory
https://security.netapp.com/advisory/ntap-20210604-0009/Third Party Advisory

Timeline

Published: Apr 13, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-29943?

How severe is CVE-2021-29943?

CVE-2021-29943 has a CVSS score of 9.1/10 (CRITICAL severity). The EPSS model estimates a 5.26% probability of exploitation in the next 30 days.

How do I fix CVE-2021-29943?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-29943?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST