Solr

CVE-2026-44825 Jun 01, 09:16 Maven CRITICAL POC GHSA Act Now

Full administrative cluster takeover in Apache Solr 9.4.0-9.10.1 and 10.0.0 arises because the 'bin/solr auth enable' setup tool silently provisions hardcoded template accounts (superadmin, admin, search, index) with publicly known default passwords alongside the operator's chosen account. Any remote attacker who reaches the Solr endpoint can authenticate with these baked-in credentials and obtain total control of the cluster. There is no public exploit identified at time of analysis and EPSS is low (0.21%), but the CVSS 9.8 rating and 'total' SSVC technical impact make this a high-severity misconfiguration-by-default flaw.

CVE-2026-22444 Jan 21, 14:16 Maven HIGH POC PATCH This Week

Apache Solr 8.6 through 9.10.0 in standalone mode fails to properly validate the "create core" API parameters, allowing authenticated users to bypass the allowPaths security restriction and access unauthorized filesystem locations. On Windows systems configured with UNC path support, this vulnerability can lead to NTLM credential hash disclosure. Affected deployments using the allowPaths setting are at risk of unauthorized core creation and information exposure.

CVE-2026-22022 Jan 21, 14:16 Maven HIGH PATCH This Week

Unauthorized API access in Apache Solr 5.3.0 through 9.10.0 allows unauthenticated attackers to bypass the RuleBasedAuthorizationPlugin due to insufficient input validation in permission rule enforcement. This vulnerability affects only deployments using multiple roles with specific predefined permissions like config-read, config-edit, schema-read, metrics-read, or security-read without the "all" permission rule defined. Successful exploitation grants attackers unauthorized access to sensitive Solr APIs, potentially exposing configuration and security data.

CVE-2025-24814 Jan 27, 09:15 Maven MEDIUM PATCH This Month

Core creation allows users to replace "trusted" configset files with arbitrary configuration Solr instances that (1) use the "FileSystemConfigSetService" component (the default in "standalone" or. Rated medium severity (CVSS 5.5), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.

CVE-2024-52012 Jan 27, 09:15 Maven MEDIUM PATCH This Month

Relative Path Traversal vulnerability in Apache Solr. Rated medium severity (CVSS 5.4), this vulnerability is remotely exploitable, low attack complexity. Epss exploitation probability 13.5% and no vendor patch available.

CVE-2024-45217 Oct 16, 08:15 Maven HIGH PATCH This Week

Insecure Default Initialization of Resource vulnerability in Apache Solr. Rated high severity (CVSS 8.1), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.

CVE-2024-45216 Oct 16, 08:15 Maven CRITICAL POC PATCH THREAT Act Now

Improper Authentication vulnerability in Apache Solr. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

CVE-2023-44487 Oct 10, 14:15 LIB HIGH POC KEV PATCH THREAT Act Now

Denial of service against HTTP/2 server implementations allows remote unauthenticated attackers to exhaust server resources by rapidly opening and immediately canceling (RST_STREAM) large numbers of streams over a single connection, a technique dubbed the 'Rapid Reset' attack. The flaw is confirmed actively exploited (CISA KEV) following large-scale weaponization observed August through October 2023, with publicly available exploit code and an EPSS score of 94.45% placing it in the 100th percentile for likelihood of exploitation. Virtually every major HTTP/2 stack - including nghttp2, Netty, Envoy, and Eclipse Jetty - is affected.

CVE-2021-44548 Dec 23, 09:15 Maven CRITICAL PATCH Act Now

An Improper Input Validation vulnerability in DataImportHandler of Apache Solr allows an attacker to provide a Windows UNC path resulting in an SMB network call being made from the Solr host to. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

CVE-2021-33813 Jun 16, 12:15 Maven HIGH POC PATCH THREAT This Week

An XXE issue in SAXBuilder in JDOM through 2.0.6 allows attackers to cause a denial of service via a crafted HTTP request. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available.

CVE-2021-29943 Apr 13, 07:15 Maven CRITICAL PATCH Act Now

When using ConfigurableInternodeAuthHadoopPlugin for authentication, Apache Solr versions prior to 8.8.2 would forward/proxy distributed requests using server credentials instead of original client. Rated critical severity (CVSS 9.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

CVE-2021-29262 Apr 13, 07:15 Maven HIGH PATCH This Week

When starting Apache Solr versions prior to 8.8.2, configured with the SaslZkACLProvider or VMParamsAllAndReadonlyDigestZkACLProvider and no existing security.json znode, if the optional read-only. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

CVE-2021-27905 Apr 13, 07:15 Maven CRITICAL POC PATCH THREAT Act Now

The ReplicationHandler (normally registered at "/replication" under a Solr core) in Apache Solr has a "masterUrl" (also "leaderUrl" alias) parameter that is used to designate another. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

CVE-2021-28163 Apr 01, 15:15 Maven LOW POC PATCH Monitor

In Eclipse Jetty 9.4.32 to 9.4.38, 10.0.0.beta2 to 10.0.1, and 11.0.0.beta2 to 11.0.1, if a user uses a webapps directory that is a symlink, the contents of the webapps directory is deployed as a. Rated low severity (CVSS 2.7), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available.

CVE-2020-13957 Oct 13, 19:15 Maven CRITICAL PATCH Act Now

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. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

CVE-2020-13941 Aug 17, 13:15 Maven HIGH PATCH This Week

Reported in SOLR-14515 (private) and fixed in SOLR-14561 (public), released in Solr version 8.6.0. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.

CVE-2018-11802 Apr 01, 22:15 Maven MEDIUM PATCH This Month

In Apache Solr, the cluster can be partitioned into multiple collections and only a subset of nodes actually host any given collection. Rated medium severity (CVSS 4.3), this vulnerability is remotely exploitable, low attack complexity. This Incorrect Authorization vulnerability could allow attackers to bypass authorization checks to access restricted resources.

CVE-2019-17558 Dec 30, 17:15 Maven HIGH POC KEV PATCH THREAT Act Now

Apache Solr 5.0.0 to Apache Solr 8.3.1 are vulnerable to a Remote Code Execution through the VelocityResponseWriter. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable. Public exploit code available and no vendor patch available.

CVE-2019-12409 Nov 18, 21:15 Maven CRITICAL POC PATCH THREAT Act Now

The 8.1.1 and 8.2.0 releases of Apache Solr contain an insecure setting for the ENABLE_REMOTE_JMX_OPTS configuration option in the default solr.in.sh configuration file shipping with Solr. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.

CVE-2019-12401 Sep 10, 15:15 Maven HIGH POC PATCH This Week

Solr versions 1.3.0 to 1.4.1, 3.1.0 to 3.6.2 and 4.0.0 to 4.10.4 are vulnerable to an XML resource consumption attack (a.k.a. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.

CVE-2019-0193 Aug 01, 14:15 Maven HIGH POC KEV PATCH THREAT This Week

In Apache Solr, the DataImportHandler, an optional but popular module to pull in data from databases and other sources, has a feature in which the whole DIH configuration can come from a request's. Rated high severity (CVSS 7.2), this vulnerability is remotely exploitable, low attack complexity. This Code Injection vulnerability could allow attackers to inject and execute arbitrary code within the application.

CVE-2019-0192 Mar 07, 21:29 Maven CRITICAL POC PATCH THREAT Act Now

In Apache Solr versions 5.0.0 to 5.5.5 and 6.0.0 to 6.6.5, the Config API allows to configure the JMX server via an HTTP POST request. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

CVE-2018-8026 Jul 05, 14:29 Maven MEDIUM POC PATCH This Month

This vulnerability in Apache Solr 6.0.0 to 6.6.4 and 7.0.0 to 7.3.1 relates to an XML external entity expansion (XXE) in Solr config files (currency.xml, enumsConfig.xml referred from schema.xml,. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity. Public exploit code available and no vendor patch available.

CVE-2018-8010 May 21, 19:29 Maven MEDIUM PATCH This Month

This vulnerability in Apache Solr 6.0.0 to 6.6.3, 7.0.0 to 7.3.0 relates to an XML external entity expansion (XXE) in Solr config files (solrconfig.xml, schema.xml, managed-schema). Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity. No vendor patch available.

CVE-2018-1308 Apr 09, 13:29 Maven HIGH PATCH This Week

This vulnerability in Apache Solr 1.2 to 6.6.2 and 7.0.0 to 7.2.1 relates to an XML external entity expansion (XXE) in the `&dataConfig=<inlinexml>` parameter of Solr's DataImportHandler. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

CVE-2017-1000190 Nov 17, 21:29 Maven CRITICAL POC PATCH Act Now

SimpleXML (latest version 2.7.1) is vulnerable to an XXE vulnerability resulting SSRF, information disclosure, DoS and so on. Rated critical severity (CVSS 9.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.

CVE-2017-12629 Oct 14, 23:29 Maven CRITICAL POC PATCH THREAT Act Now

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. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and EPSS exploitation probability 93.9%.

CVE-2017-9803 Sep 18, 21:29 Maven HIGH PATCH This Week

Apache Solr's Kerberos plugin can be configured to use delegation tokens, which allows an application to reuse the authentication of an end-user or another application. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable. This Improper Authentication vulnerability could allow attackers to bypass authentication mechanisms to gain unauthorized access.

CVE-2017-3163 Aug 30, 14:29 Maven HIGH PATCH Act Now

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. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Epss exploitation probability 11.9%.

CVE-2017-7660 Jul 07, 19:29 Maven HIGH PATCH This Week

Apache Solr uses a PKI based mechanism to secure inter-node communication when security is enabled. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This Improper Authentication vulnerability could allow attackers to bypass authentication mechanisms to gain unauthorized access.

CVE-2015-8797 Feb 15, 02:59 Maven MEDIUM PATCH This Month

Cross-site scripting (XSS) vulnerability in webapp/web/js/scripts/plugins.js in the stats page in the Admin UI in Apache Solr before 5.3.1 allows remote attackers to inject arbitrary web script or. Rated medium severity (CVSS 6.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity.

CVE-2015-8796 Feb 15, 02:59 Maven MEDIUM PATCH This Month

Cross-site scripting (XSS) vulnerability in webapp/web/js/scripts/schema-browser.js in the Admin UI in Apache Solr before 5.3 allows remote attackers to inject arbitrary web script or HTML via a. Rated medium severity (CVSS 6.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity.

CVE-2015-8795 Feb 15, 02:59 Maven MEDIUM PATCH This Month

Multiple cross-site scripting (XSS) vulnerabilities in the Admin UI in Apache Solr before 5.1 allow remote attackers to inject arbitrary web script or HTML via crafted fields that are mishandled. Rated medium severity (CVSS 6.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity.

CVE-2014-3628 Jan 06, 15:59 Maven MEDIUM PATCH This Month

Cross-site scripting (XSS) vulnerability in the Admin UI Plugin / Stats page in Apache Solr 4.x before 4.10.3 allows remote attackers to inject arbitrary web script or HTML via the fieldvaluecache. Rated medium severity (CVSS 4.3), this vulnerability is remotely exploitable.

CVE-2012-6612 Dec 07, 21:55 Maven HIGH PATCH This Week

The (1) UpdateRequestHandler for XSLT or (2) XPathEntityProcessor in Apache Solr before 4.1 allows remote attackers to have an unspecified impact via XML data containing an external entity. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, low attack complexity.

CVE-2013-6408 Dec 07, 20:55 Maven MEDIUM PATCH This Month

The DocumentAnalysisRequestHandler in Apache Solr before 4.3.1 does not properly use the EmptyEntityResolver, which allows remote attackers to have an unspecified impact via XML data containing an. Rated medium severity (CVSS 6.4), this vulnerability is remotely exploitable, low attack complexity. Epss exploitation probability 11.4%.

CVE-2013-6407 Dec 07, 20:55 Maven MEDIUM PATCH This Month

The UpdateRequestHandler for XML in Apache Solr before 4.1 allows remote attackers to have an unspecified impact via XML data containing an external entity declaration in conjunction with an entity. Rated medium severity (CVSS 6.4), this vulnerability is remotely exploitable, low attack complexity. Epss exploitation probability 11.4%.

CVE-2013-6397 Dec 07, 20:55 Maven MEDIUM POC PATCH THREAT This Month

Directory traversal vulnerability in SolrResourceLoader in Apache Solr before 4.6 allows remote attackers to read arbitrary files via a .. Rated medium severity (CVSS 4.3), this vulnerability is remotely exploitable. Public exploit code available and EPSS exploitation probability 90.9%.