CVE-2017-12629
CriticalSummary
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.
Risk Assessment
Organizations may be exposed to remote code execution, potentially leading to server takeover and data leakage.
Recommendation
It is recommended to upgrade Apache Solr to version 7.1 or later and to monitor API configurations to minimize the risk associated with XXE attacks.
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-2017-3163High
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.
- 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-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)
Remote code execution occurs in Apache Solr before 7.1 with Apache Lucene before 7.1 by exploiting XXE in conjunction with use of a Config API add-listener command to reach the RunExecutableListener class. Elasticsearch, although it uses Lucene, is NOT vulnerable to this. Note that the XML external entity expansion vulnerability occurs in the XML Query Parser which is available, by default, for any query request with parameters deftype=xmlparser and can be exploited to upload malicious data to the /upload request handler or as Blind XXE using ftp wrapper in order to read arbitrary local files from the Solr server. Note also that the second vulnerability relates to remote code execution using the RunExecutableListener available on all affected versions of Solr.