CVE-2017-7660

What it is

Apache Solr uses a PKI based mechanism to secure inter-node communication when security is enabled. It is possible to create a specially crafted node name that does not exist as part of the cluster and point it to a malicious node. This can trick the nodes in cluster to believe that the malicious node is a member of the cluster. So, if Solr users have enabled BasicAuth authentication mechanism using the BasicAuthPlugin or if the user has implemented a custom Authentication plugin, which does not implement either "HttpClientInterceptorPlugin" or "HttpClientBuilderPlugin", his/her servers are vulnerable to this attack. Users who only use SSL without basic authentication or those who use Kerberos are not affected.

At a glance

Exploitability

Can be exploited over the network without logging in. High risk of data tampering.

Exploit odds

5.6% chance of exploitation in the next 30 days (EPSS).

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2017-07-07 19:29 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-06-17 01:24 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 5.6% in the next 30 days (EPSS).
• Severity: 7.5 HIGH (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2017-07-07 19:29 UTC

Last modified

2026-06-17 01:24 UTC

Exploit probability

5.6% · EPSS, next 30 days

Weakness

CWE-287 · Improper authentication

Record status

Modified

Affected

• Apache Solr 5.3.0
• Apache Solr 5.3.1
• Apache Solr 5.3.2
• Apache Solr 5.4.0
• Apache Solr 5.4.1
• Apache Solr 5.5.0
• Apache Solr 5.5.1
• Apache Solr 5.5.2

Attack profile CVSS 3.0 · 7.5

Attack vector

Network

Complexity

Low

Privileges needed

None

User interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

High

Availability

None

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2017-7660.md and follow it. Check whether this project is affected by CVE-2017-7660. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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