CVE-2021-29943
Apache Solr Unprivileged users may be able to perform unauthorized read/write to collections
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- None
Exploit likelihood
What each source reports
NVD Score used
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.
- Record
CVE-2021-29943- CVSS 3.1
- 9.1 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N - CVSS 2.0
- 6.4 Medium
AV:N/AC:L/Au:N/C:P/I:P/A:N - Weakness
- CWE-863
- Updated
- 2026-11-02
CVE List No score
Apache Solr Unprivileged users may be able to perform unauthorized read/write to collections
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.
- Record
CVE-2021-29943- Weakness
- CWE-863
- Updated
- 2026-11-02
EUVDEUVD-2021-1201 No score
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.
- Record
EUVD-2021-1201- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-vf7p-j8x6-xvwp
Incorrect Authorization in Apache Solr
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.
- Record
GHSA-vf7p-j8x6-xvwp- CVSS 3.1
- 9.1 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N - Weakness
- CWE-863
- Updated
- 2026-11-02
OSV
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.
- Record
CVE-2021-29943- CVSS 3.1
- 9.1 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N - Updated
- 2026-11-02
OSVGHSA-vf7p-j8x6-xvwp
Incorrect Authorization in Apache Solr
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.
- Record
GHSA-vf7p-j8x6-xvwp- CVSS 3.1
- 9.1 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N - Weakness
- CWE-863
- Updated
- 2026-11-02
OSVUBUNTU-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 incorrect authorization resolution on the receiving hosts.
- Record
UBUNTU-CVE-2021-29943- CVSS 3.1
- 9.1 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N - Updated
- 2026-11-02
OSVBIT-solr-2021-29943 No score
Apache Solr Unprivileged users may be able to perform unauthorized read/write to collections
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.
- Record
BIT-solr-2021-29943- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
org.apache.solr:solr-parentMaven |
before 8.8.2 | 8.8.2 |
solrBitnami |
before 8.8.2 | 8.8.2 |
org.apache.solr:solr-parentMaven |
before 8.8.2, plus listed versions 1.3.01.4.01.4.13.1.03.2.0 Show 45 moreShow less3.3.03.4.03.5.03.6.03.6.13.6.24.0.04.0.0-ALPHA4.0.0-BETA4.1.04.10.04.10.14.10.24.10.34.10.44.2.04.2.14.3.04.3.14.4.04.5.04.5.14.6.04.6.14.7.04.7.14.7.24.8.04.8.14.9.04.9.15.0.05.1.05.2.05.2.15.3.05.3.15.3.25.4.05.4.15.5.05.5.15.5.25.5.35.5.4 |
8.8.2 |
lucene-solrUbuntu:Pro:14.04:LTS |
All versions, plus listed versions 3.6.2+dfsg-13.6.2+dfsg-23.6.2+dfsg-2ubuntu0.1~esm13.6.2+dfsg-2ubuntu0.1~esm23.6.2+dfsg-2ubuntu0.1~esm4 |
None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-29943 is a critical vulnerability (CVSS 9.1) in Apache Solr, published April 13, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 4.67%, the 91st percentile. Fixed in org.apache.solr:solr-parent 8.8.2.
References
lists.apache.org/thread.html/r91dd0ff556e0c9aab4c92852e0e540c59d4633718ce12881558cf44d%40%3Cusers.solr.apache.org%3E
security.netapp.com/advisory/ntap-20210604-0009
nvd.nist.gov/vuln/detail/CVE-2021-29943
github.com/advisories/GHSA-vf7p-j8x6-xvwp
ubuntu.com/security/CVE-2021-29943
cve.org/CVERecord?id=CVE-2021-29943
Left out here: 51 versions. The JSON record has them.