{"id":"CVE-2019-17558","published":"2019-12-30T17:15:19Z","modified":"2026-06-17T02:24:09Z","title":"Apache Solr VelocityResponseWriter Plug-In Remote Code Execution Vulnerability","vendor":"Apache","product":"Solr","tier":"core","eol":null,"description":{"text":"Apache Solr 5.0.0 to Apache Solr 8.3.1 are vulnerable to a Remote Code Execution through the VelocityResponseWriter. A Velocity template can be provided through Velocity templates in a configset `velocity/` directory or as a parameter. A user defined configset could contain renderable, potentially malicious, templates. Parameter provided templates are disabled by default, but can be enabled by setting `params.resource.loader.enabled` by defining a response writer with that setting set to `true`. Defining a response writer requires configuration API access. Solr 8.4 removed the params resource loader entirely, and only enables the configset-provided template rendering when the configset is `trusted` (has been uploaded by an authenticated user).","provenance":"source","from":"NVD"},"summary":{"text":"Apache Solr versions 5.0.0 through 8.3.1 contain a flaw in the VelocityResponseWriter plug-in that can lead to remote code execution through malicious Velocity templates. An attacker with network access and low privileges, specifically access to the configuration API or a user-uploaded configset, could supply a crafted template, and the exploit becomes possible when the parameter-provided template loader is enabled or a configset is untrusted, with high complexity required to succeed.","provenance":"ai","model":"claude-haiku-5-5","generatedAt":"2026-10-31T04:54:41Z"},"cvss":{"score":7.5,"severity":"HIGH","version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","provenance":"source","from":"NVD"},"epss":{"score":0.98567,"percentile":0.99922,"date":"2026-10-30","provenance":"source"},"kev":{"dateAdded":"2021-11-03","dueDate":"2022-05-03","ransomware":false,"requiredAction":"Apply updates per vendor instructions.","notes":"https://nvd.nist.gov/vuln/detail/CVE-2019-17558","provenance":"source"},"vulncheckKev":{"dateAdded":"2021-11-03","exploitedFirstSeen":"2021-11-03","ransomware":false,"evidence":[{"url":"https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json","date":"2021-11-03"},{"url":"https://25491742.fs1.hubspotusercontent-eu1.net/hubfs/25491742/WAZAWAKA_TLPCLEAR_Report.pdf","date":"2023-12-20"},{"url":"https://www.trustwave.com/en-us/resources/blogs/spiderlabs-blog/lessons-from-a-honeypot-with-us-citizens-data/","date":"2024-11-13"},{"url":"https://dashboard.shadowserver.org/statistics/honeypot/vulnerability/map/?day=2026-07-09&host_type=src&vulnerability=cve-2019-17558","date":"2026-07-09"},{"url":"https://dashboard.shadowserver.org/statistics/honeypot/vulnerability/map/?day=2026-07-31&host_type=src&vulnerability=cve-2019-17558","date":"2026-07-31"},{"url":"https://dashboard.shadowserver.org/statistics/honeypot/vulnerability/map/?day=2026-10-24&host_type=src&vulnerability=cve-2019-17558","date":"2026-10-24"},{"url":"https://dashboard.shadowserver.org/statistics/honeypot/vulnerability/map/?day=2026-10-25&host_type=src&vulnerability=cve-2019-17558","date":"2026-10-25"},{"url":"https://dashboard.shadowserver.org/statistics/honeypot/vulnerability/map/?day=2026-10-27&host_type=src&vulnerability=cve-2019-17558","date":"2026-10-27"}],"evidenceTotal":8,"provenance":"source"},"exploited":true,"otx":{"pulseCount":50,"pulses":[{"name":"Actively_Exploited_Kev 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VelocityResponseWriter. ","confidence":"medium","confidenceNote":"CTID KEV capability group \"code execution\" is generic"},{"id":"T1059","name":"Command and Scripting Interpreter","tactics":["execution"],"provenance":"source","basis":"ctid-kev","bases":["ctid-kev"],"basisDetail":"CTID Mappings Explorer KEV 07/28/2025 (ATT&CK 16.1); capability: Code Execution","mappingType":"primary_impact","evidence":[],"comment":"CVE-2019-17558 is a vulnerability in Apache Solr that allows for Remote Code Execution (RCE) through the VelocityResponseWriter. ","confidence":"medium","confidenceNote":"CTID KEV capability group \"code execution\" is generic"}],"reports":[],"affected":[{"ecosystem":"Maven","package":"org.apache.solr:solr-core","vulnerableRanges":[">=5.0.0, <8.4.0",">=6.0.0, <8.4.0",">=7.0.0, <8.4.0",">=8.0.0, <8.4.0"],"patched":["8.4.0"],"from":["GHSA-ww97-9w65-2crx"],"provenance":"source"}],"advisories":[{"id":"GHSA-ww97-9w65-2crx","url":"https://github.com/advisories/GHSA-ww97-9w65-2crx","severity":"HIGH","ecosystem":"Maven","package":"org.apache.solr:solr-core","vulnerableRanges":[">=5.0.0, <8.4.0"],"patched":["8.4.0"],"provenance":"source","from":"GHSA"},{"id":"GHSA-ww97-9w65-2crx","url":"https://github.com/advisories/GHSA-ww97-9w65-2crx","severity":"HIGH","ecosystem":"Maven","package":"org.apache.solr:solr-core","vulnerableRanges":[">=6.0.0, <8.4.0"],"patched":["8.4.0"],"provenance":"source","from":"GHSA"},{"id":"GHSA-ww97-9w65-2crx","url":"https://github.com/advisories/GHSA-ww97-9w65-2crx","severity":"HIGH","ecosystem":"Maven","package":"org.apache.solr:solr-core","vulnerableRanges":[">=7.0.0, <8.4.0"],"patched":["8.4.0"],"provenance":"source","from":"GHSA"},{"id":"GHSA-ww97-9w65-2crx","url":"https://github.com/advisories/GHSA-ww97-9w65-2crx","severity":"HIGH","ecosystem":"Maven","package":"org.apache.solr:solr-core","vulnerableRanges":[">=8.0.0, <8.4.0"],"patched":["8.4.0"],"provenance":"source","from":"GHSA"}],"euvd":{"id":"EUVD-2020-0320","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2020-0320","exploited":true,"exploitedSince":"2021-11-03","provenance":"source"},"exploits":[{"id":47572,"url":"https://www.exploit-db.com/exploits/47572","title":"Apache Solr 8.2.0 - Remote Code Execution","type":"webapps","platform":"java","date":"2019-11-01","verified":false,"provenance":"source"},{"id":48338,"url":"https://www.exploit-db.com/exploits/48338","title":"Apache Solr - Remote Code Execution via Velocity Template (Metasploit)","type":"remote","platform":"multiple","date":"2020-04-16","verified":true,"provenance":"source"}],"exploitSources":{"exploitdb":{"count":2,"earliest":"2019-11-01"},"pocGithub":{"count":6,"skipped":0,"earliest":"2020-03-27","earliestUrl":"https://github.com/thelostworldFree/CVE-2019-17558_Solr_Vul_Tool","repos":[{"name":"zhzyker/exphub","url":"https://github.com/zhzyker/exphub","stars":4295,"created":"2020-04-01"},{"name":"Ma1Dong/Solr_CVE-2019-17558","url":"https://github.com/Ma1Dong/Solr_CVE-2019-17558","stars":2,"created":"2020-08-04"},{"name":"thelostworldFree/CVE-2019-17558_Solr_Vul_Tool","url":"https://github.com/thelostworldFree/CVE-2019-17558_Solr_Vul_Tool","stars":1,"created":"2020-03-27"},{"name":"rogerzeferino/cve-2019-17558-apache-solr-rce","url":"https://github.com/rogerzeferino/cve-2019-17558-apache-solr-rce","stars":1,"created":"2026-02-16"},{"name":"xkyrage/Exploit_CVE-2019-17558-RCE","url":"https://github.com/xkyrage/Exploit_CVE-2019-17558-RCE","stars":0,"created":"2020-12-15"}]},"metasploit":[{"name":"Apache Solr Remote Code Execution via Velocity Template","module":"exploit/multi/http/solr_velocity_rce","type":"exploit","disclosureDate":"2019-10-29","url":"https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/multi/http/solr_velocity_rce.rb"}],"nuclei":[{"id":"CVE-2019-17558","name":"Apache Solr <=8.3.1 - Remote Code Execution","severity":"high","path":"http/cves/2019/CVE-2019-17558.yaml","url":"https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2019/CVE-2019-17558.yaml"}],"first":{"date":"2019-10-29","source":"Metasploit","url":"https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/multi/http/solr_velocity_rce.rb"},"provenance":"source"},"exploitRefs":["http://packetstormsecurity.com/files/157078/Apache-Solr-8.3.0-Velocity-Template-Remote-Code-Execution.html","https://issues.apache.org/jira/browse/SOLR-13971","https://lists.apache.org/thread.html/r5074d814d3a8c75df4b20e66bfd268ee0a73ddea7e85070cec3ae78d%40%3Cissues.lucene.apache.org%3E","https://lists.apache.org/thread.html/rf6d7ffae2b940114324e036b6394beadf27696d051ae0c4a5edf07af%40%3Cissues.lucene.apache.org%3E"],"flow":[{"stage":"exploitation","techniques":["T1190"],"provenance":"source"},{"stage":"primary","techniques":["T1059"],"provenance":"source"}],"timeline":[{"date":"2019-10-29","kind":"exploit-public","label":"First public exploit: Metasploit; 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2 Exploit-DB entries; 6 PoC-in-GitHub repos; 1 Metasploit module; 1 nuclei template"},{"name":"Mentioned in OTX pulses","points":3.0,"detail":"50 pulses"},{"name":"CVSS severity","points":5.25,"detail":"base score 7.5"},{"name":"End-of-life product","points":0.0,"detail":"supported or unknown"}]}}