CVE-2020-13957
CriticalIncorrect Authorization in Apache Solr
Published Feb 10, 2022 · Updated Sep 8, 2026 · Also known as BIT-solr-2020-13957, GHSA-3c7p-vv5r-cmr5
Key Facts
Patch immediately- CVE-2020-13957 is a critical-severity vulnerability (CVSS 9.8 v3.1) affecting Solr (Apache), lucene-solr (debian), org.apache.solr:solr-core (maven) and 2 more products.
- It is not listed in any known-exploited vulnerabilities catalog. No public exploit code is known.
- EPSS estimates a 79% probability of exploitation in the next 30 days.
- Fixed versions are available, including Solr <=6.6.6, Solr 6.6.7, Solr 7.7.4.
- Brandefense priority: patch immediately, because it is very likely to be exploited soon.
CVSS v3.1
9.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
79%
Higher than 99.6% of all scored CVEs
Exploited in the wild
No known
Not in a known-exploited catalog
Public exploit code
None known
Get the full CVE-2020-13957 brief as a PDF
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Description
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
11 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| SolrApache | >= 6.6.0, >= Apache Solr 6.6.0 to 6.6.6, 7.0.0 to 7.7.3, 8.0.0 to 8.6.2 | 6.6.6 |
| lucene-solrdebian | See advisory | 0 |
| org.apache.solr:solr-coremaven | >= 6.6.0 | 8.6.3 |
| org.apache.solr:solr-parentmaven | >= 6.6.0 | 8.6.3 |
| org.apache.solr:solr-solrjmaven | >= 6.6.0 | 8.6.3 |
Patched Releases
Solr
<=6.6.6, 6.6.7, 7.7.4, 8.6.3
org.apache.solr:solr-core
8.6.3
org.apache.solr:solr-parent
8.6.3
org.apache.solr:solr-solrj
8.6.3
Timeline
Publicly disclosed
Feb 10, 2022
Last updated
Sep 8, 2026
Weakness Type
- CWE-862 Missing Authorization
- CWE-863 Incorrect Authorization
References
- advisoryGHSA advisory
- advisoryhttps://nvd.nist.gov/vuln/detail/CVE-2020-13957
- advisoryhttps://security.netapp.com/advisory/ntap-20201023-0002/
- articlehttps://github.com/apache/solr/commit/e001c2221812a0ba9e9378855040ce72f93eced4
- articlehttps://lists.apache.org/thread.html/r13a728994c60be5b5a7049282b5c926dac1fc6a9a0b2362f6adfa573@%3Cissues.lucene.apache.org%3E
FAQ
Common Questions.
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.
Affected: Solr (Apache) versions >= 6.6.0, >= Apache Solr 6.6.0 to 6.6.6, 7.0.0 to 7.7.3, 8.0.0 to 8.6.2; lucene-solr (debian); org.apache.solr:solr-core (maven) versions >= 6.6.0, among others. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
No public exploit code is known.
Fixed versions are available, including Solr <=6.6.6, Solr 6.6.7, Solr 7.7.4.
Brandefense priority: patch immediately, because it is very likely to be exploited soon.
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