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CVE-2020-13957

Incorrect Authorization in Apache Solr

9.8 CriticalPublic exploitFix available

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.

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
High

Exploit likelihood

79.3%Up 19.9 points since Apr 14, 2021
90%50%10%1%

What each source reports

NVD Score used 9.8

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.

Record
CVE-2020-13957
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0
7.5 HighAV:N/AC:L/Au:N/C:P/I:P/A:P
Weakness
CWE-863
Updated
2026-11-02
CVE List No score

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.

Record
CVE-2020-13957
Updated
2026-11-02
EUVDEUVD-2022-0788 No score

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.

Record
EUVD-2022-0788
Updated
2026-11-03
GitHub AdvisoriesGHSA-3c7p-vv5r-cmr5 9.8

Incorrect Authorization in Apache Solr

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. This issue is patched in 8.6.3.

Record
GHSA-3c7p-vv5r-cmr5
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-863
Updated
2026-11-02
OSV 9.8

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.

Record
CVE-2020-13957
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVGHSA-3c7p-vv5r-cmr5 9.8

Incorrect Authorization in Apache Solr

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. This issue is patched in 8.6.3.

Record
GHSA-3c7p-vv5r-cmr5
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-863
Updated
2026-11-02
OSVBIT-solr-2020-13957 No score

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.

Record
BIT-solr-2020-13957
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
org.apache.solr:solr-parent
Maven
 6.6.0 up to 8.6.3
8.6.3
org.apache.solr:solr-solrj
Maven
 6.6.0 up to 8.6.3
8.6.3
org.apache.solr:solr-core
Maven
 6.6.0 up to 8.6.3
8.6.3
solr
Bitnami
 6.6.0 up to 6.6.7, 7.0.0 up to 7.7.4, 8.0.0 up to 8.6.3
6.6.77.7.48.6.3
org.apache.solr:solr-parent
Maven
 6.6.0 up to 8.6.3, plus listed versions
6.6.16.6.26.6.36.6.46.6.5
Show 29 moreShow less
6.6.67.0.07.0.17.1.07.2.07.2.17.3.07.3.17.4.07.5.07.6.07.7.07.7.17.7.27.7.38.0.08.1.08.1.18.2.08.3.08.3.18.4.08.4.18.5.08.5.18.5.28.6.08.6.18.6.2
8.6.3
org.apache.solr:solr-solrj
Maven
 6.6.0 up to 8.6.3, plus listed versions
6.6.16.6.26.6.36.6.46.6.5
Show 29 moreShow less
6.6.67.0.07.0.17.1.07.2.07.2.17.3.07.3.17.4.07.5.07.6.07.7.07.7.17.7.27.7.38.0.08.1.08.1.18.2.08.3.08.3.18.4.08.4.18.5.08.5.18.5.28.6.08.6.18.6.2
8.6.3
org.apache.solr:solr-core
Maven
 6.6.0 up to 8.6.3, plus listed versions
6.6.16.6.26.6.36.6.46.6.5
Show 29 moreShow less
6.6.67.0.07.0.17.1.07.2.07.2.17.3.07.3.17.4.07.5.07.6.07.7.07.7.17.7.27.7.38.0.08.1.08.1.18.2.08.3.08.3.18.4.08.4.18.5.08.5.18.5.28.6.08.6.18.6.2
8.6.3

Public exploits

Links only. Every CVE stores no exploit code.

Public exploits
SourceLinkDate
PoC in GitHubs-index/CVE-2020-139572021-05-09

History

History
RecordedChangedSources
aliases, productsEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV, PoC in GitHub

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2020-13957 is a critical vulnerability (CVSS 9.8) in Apache Solr, published October 13, 2020. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 79.3%, the 99th percentile. Fixed in org.apache.solr:solr-parent 8.6.3.

References

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