CVE-2017-3163
HighSummary
A vulnerability in Apache Solr allows attackers to exploit the index replication feature to read files from the server due to improper validation of file names. Versions before 5.5.4 and 6.x before 6.4.1 are susceptible to path traversal attacks.
Risk Assessment
Organizations may be at risk of exposing sensitive files if Solr servers are not properly secured. Servers protected by firewalls or authentication are less at risk.
Recommendation
It is recommended to upgrade Apache Solr to version 5.5.4 or 6.4.1 and implement appropriate security measures such as firewalls and authentication to restrict access to the server.
Other vulnerabilities in Apache Solr
See all- CVE-2026-22444High
The "create core" API of Apache Solr 8.6 through 9.10.0 lacks sufficient input validation on some API parameters, which can cause Solr to check the existence of and attempt to read file-system paths that should be disallowed by Solr's "allowPaths" security setting. These read-only accesses can allow users to create cores using unexpected configsets if any are accessible via the filesystem. On Windows systems configured to allow UNC paths this can additionally cause disclosure of NTLM "user" hashes.
- CVE-2026-22022High
Deployments of Apache Solr 5.3.0 through 9.10.0 that rely on Solr's "Rule Based Authorization Plugin" are vulnerable to allowing unauthorized access to certain Solr APIs, due to insufficiently strict input validation in those components. Only deployments that meet all of the following criteria are impacted: use of the RuleBasedAuthorizationPlugin, a config with multiple roles, a permission list using one or more of the predefined permission rules (config-read, config-edit, schema-read, metrics-read, security-read), no "all" permission defined, and a networking setup that allows unfiltered requests to Solr.
- CVE-2017-7660High
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, which can trick other nodes in the cluster.
- CVE-2017-12629Critical
Apache Solr before 7.1 is vulnerable to remote code execution, which can be exploited via an XXE attack in conjunction with the Config API add-listener command, leading to the RunExecutableListener class.
- CVE-2026-44825High
Apache Solr versions 9.4.0 through 9.10.1 and 10.0.0 contain hardcoded default credentials in the Basic Authentication setup tool (bin/solr auth enable). A remote attacker can gain full administrative access to the cluster using publicly known default passwords.
Original NVD description (English source)
When using the Index Replication feature, Apache Solr nodes can pull index files from a master/leader node using an HTTP API which accepts a file name. However, Solr before 5.5.4 and 6.x before 6.4.1 did not validate the file name, hence it was possible to craft a special request involving path traversal, leaving any file readable to the Solr server process exposed. Solr servers protected and restricted by firewall rules and/or authentication would not be at risk since only trusted clients and users would gain direct HTTP access.