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CVE-2020-13957

73
FAUCET Score

CVE-2020-13957 is a critical vulnerability affecting Apache Solr versions 6.6.0-6.6.6, 7.0.0-7.7.3, and 8.0.0-8.6.2. It allows unauthenticated attackers to bypass security checks and configure dangerous features, potentially leading to remote code execution. With a CVSS score of 9.8 (Critical) and an EPSS score indicating high exploitability, this vulnerability poses a significant risk due to its network-based attack vector, low complexity, and complete compromise of confidentiality, integrity, and availability. While there is no evidence of active exploitation, public exploit code, or significant community discussion, the high FAUCET Risk Score of 99/100 underscores its severe potential.

Impacted Technologies

VendorProductVersion(s)CPE
>= 6.6.0, <= 6.6.6CPE matchmatch criteria
cpe:2.3:a:apache:solr:*:*:*:*:*:*:*:*
>= 7.0.0, <= 7.7.3CPE matchmatch criteria
cpe:2.3:a:apache:solr:*:*:*:*:*:*:*:*
>= 8.0.0, <= 8.6.2CPE matchmatch criteria
cpe:2.3:a:apache:solr:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
78.87%
Probability of exploitation in next 30 days
EPSS Percentile
99.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.7887 is in the 98th percentile among its peer group of 36,897 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (3)

mavenpatch availablevia ghsa
Product: org.apache.solr:solr-parentFixed in: 8.6.3
mavenpatch availablevia ghsa
Product: org.apache.solr:solr-solrjFixed in: 8.6.3
mavenpatch availablevia ghsa
Product: org.apache.solr:solr-coreFixed in: 8.6.3

Vendor Advisories (2)

mavenGHSA-3c7p-vv5r-cmr5critical

Incorrect Authorization in Apache Solr

Feb 10, 2022
redhatCVE-2020-13957Important

solr: The checks added to unauthenticated configset uploads can be circumvented

Oct 12, 2020

References

lists.apache.org / thread.html/r13a728994c60be5b5a7049282b5c926dac1fc6a9a0b2362f6adfa573%40%3Cissues.lucene.apache.org%3E
lists.apache.org / thread.html/r1c783d3d81ba62f3381a17a4d6c826f7dead3a132ba42349c90df075%40%3Ccommits.lucene.apache.org%3E
lists.apache.org / thread.html/r1d4a247329a8478073163567bbc8c8cb6b49c6bfc2bf58153a857af1%40%3Ccommits.druid.apache.org%3E
lists.apache.org / thread.html/r2236fdf99ac3efbfc36c2df96d3a88f822baa6f45e13fec7ff558e34%40%3Cdev.bigtop.apache.org%3E
lists.apache.org / thread.html/r226c1112bb41e7cd427862d875eff9877a20a40242c2542f4dd39e4a%40%3Cissues.lucene.apache.org%3E
lists.apache.org / thread.html/r2a6600fe9afd502c04d26fd112823ec3f3c3ad1b4a289d10567a78a0%40%3Cdev.bigtop.apache.org%3E
lists.apache.org / thread.html/r2f8d33a4de07db9459fb2a98a1cd39747066137636b53f84a13e5628%40%3Cissues.lucene.apache.org%3E
lists.apache.org / thread.html/r3d1e24a73e6bffa1d6534e1f34c8f5cbd9999495e7d933640f4fa0ed%40%3Cissues.lucene.apache.org%3E
lists.apache.org / thread.html/r3da9895cea476bcee2557531bebd4e8f6f367dc3ea900a65e2f51cd8%40%3Cissues.bigtop.apache.org%3E
lists.apache.org / thread.html/r4ca8ba5980d9049cf3707798aa3116ee76c1582f171ff452ad2ca75e%40%3Cissues.lucene.apache.org%3E
lists.apache.org / thread.html/r5557641fcf5cfd99260a7037cfbc8788fb546b72c98a900570edaa2e%40%3Cissues.lucene.apache.org%3E
lists.apache.org / thread.html/r622a043c2890327f8a4aea16b131e8a7137a282a004614369fceb224%40%3Cdev.bigtop.apache.org%3E
lists.apache.org / thread.html/r7512ae552cd9d14ab8b1bc0a7e95f2ec52ae85364f068d4034398ede%40%3Cissues.lucene.apache.org%3E
lists.apache.org / thread.html/r853fdc6d0b91d5e01a26c7bd5becb044ad775a231703d634ca5d55c9%40%3Cissues.lucene.apache.org%3E
lists.apache.org / thread.html/r8b1782d42d0a4ce573495d5d9345ad328d652c68c411ccdb245c57e3%40%3Cissues.lucene.apache.org%3E
lists.apache.org / thread.html/r999f828e6e37d9e825e207471cbfd2681c3befcd7f3abd59ed87c0d5%40%3Cissues.bigtop.apache.org%3E
lists.apache.org / thread.html/r9d7356f209ee30d702b6a921c866564eb2e291b126640c7ab70feea7%40%3Ccommits.lucene.apache.org%3E
lists.apache.org / thread.html/rb1de6ba50a468e9baff32a249edaa08f6bcec7dd7cc208e25e6b48c8%40%3Cissues.bigtop.apache.org%3E
lists.apache.org / thread.html/rb2f1c7fd3d3ea719dfac4706a80e6affddecae8663dda04e1335347f%40%3Ccommits.bigtop.apache.org%3E
lists.apache.org / thread.html/rf1a32f00017e83ff29a74be2de02e28e4302dddb5f14c624e297a8c0%40%3Cdev.bigtop.apache.org%3E
mail-archives.us.apache.org / mod_mbox/www-announce/202010.mbox/%3CCAECwjAWCVLoVaZy%3DTNRQ6Wk9KWVxdPRiGS8NT%2BPHMJCxbbsEVg%40mail.gmail.com%3E
Mailing ListVendor Advisory
security.netapp.com / advisory/ntap-20201023-0002
Third Party Advisory