CVE-2019-17558

CRITICALNVD 7.59.0▲
EchelonGraph scoreHIGH confidence

Score elevated to 9.0 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2021-11-03), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 7.5 retained for reference. Confidence: HIGH.

Triggered by: CISA KEV (actively exploited)
Sources: cisa_kev, epss, nvd
Exploited in the wild
9.0EG
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS PROB: 99%CVSS: 7.5Exploit: cisa kev · ssvc active · Metasploit · Exploit-DB (verified) · epss top5pct · epss high · public exploitExposed services: Not assessed

A fix is available — apply it.

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).

CVSS v3
7.5
EG Score
9.0CRITICALhigh confidence
EG Risk
81
EG Risk 81/100CISA SSVC

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity90% × 45%
Exploitation100% × 40%
Automatability0% × 15%
CISA SSVC: Track at low, Attend at medium and Act at high mission impact.
Action: A fix is available. Apply it within your standard update timelines at low, sooner than that at medium and as soon as possible at high mission impact.
EPSS PROB
99%
EPSS %ILE
99th
KEV
⚠ Exploited

CISA SSVCTrack at low, Attend at medium and Act at high mission impact.

A fix is available. Apply it within your standard update timelines at low, sooner than that at medium and as soon as possible at high mission impact.

Exploitation active (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

December 30, 2019

Last Modified

October 27, 2025

Advisory Details (9)

Auto-updated Jun 4, 2026
⚠️ Active exploitation confirmed. Patch available.
generic
https://lists.apache.org/thread.html/r36e35fd76239a381643555966fb3e72139e018d52d76544fb42f96d8%40%3Cissues.lucene.apache.org%3E
generic
https://lists.apache.org/thread.html/r339865b276614661770c909be1dd7e862232e3ef0af98bfd85686b51%40%3Cdev.lucene.apache.org%3E
generic
https://lists.apache.org/thread.html/r25f1bd4545617f5b86dde27b4c30fec73117af65598a30e20209739a%40%3Cissues.lucene.apache.org%3E
generic
https://lists.apache.org/thread.html/r204ba2a9ea750f38d789d2bb429cc0925ad6133deea7cbc3001d96b5%40%3Csolr-user.lucene.apache.org%3E
generic
https://lists.apache.org/thread.html/r1d4a247329a8478073163567bbc8c8cb6b49c6bfc2bf58153a857af1%40%3Ccommits.druid.apache.org%3E
generic
https://lists.apache.org/thread.html/r19d23e8640236a3058b4d6c23e5cd663fde182255f5a9d63e0606a66%40%3Cdev.lucene.apache.org%3E
generic
https://lists.apache.org/thread.html/r12ab2cb15a34e49b4fecb5b2bdd7e10f3e8b7bf1f4f47fcde34d3a7c%40%3Cissues.lucene.apache.org%3E
generic
https://lists.apache.org/thread.html/r0b7b9d4113e6ec1ae1d3d0898c645f758511107ea44f0f3a1210c5d5%40%3Cissues.lucene.apache.org%3E
generic🔴 Active Exploitation

[SOLR-13971] Velocity custom template RCE vulnerability - ASF Jira

https://issues.apache.org/jira/browse/SOLR-13971

Affected Packages

(5 across 5 ecosystems)
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
lucene-solr3.6.2+dfsg-24, 3.6.2+dfsg-25, 3.6.2+dfsg-26, 3.6.2+dfsg-27
  • every version on: no fix on record
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
lucene-solr3.6.2+dfsg-26, 3.6.2+dfsg-27
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
lucene-solr3.6.2+dfsg-26, 3.6.2+dfsg-27
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
lucene-solr3.6.2+dfsg-26, 3.6.2+dfsg-27
  • every version on: no fix on record
—
Maven(1)
PackageVulnerable rangeFix by version rangeDependents
org.apache.solr:solr-core8.0.0 ... 8.3.1 (6 versions)
  • 5.0.0 up to 8.4.0: fixed in 8.4.0
  • 6.0.0 up to 8.4.0: fixed in 8.4.0
  • 7.0.0 up to 8.4.0: fixed in 8.4.0
  • 8.0.0 up to 8.4.0: fixed in 8.4.0
—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 2× in last 7d / 18× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 102 total refreshes for this CVE.

  1. 2026-10-03 17:17 UTCEG score recompute
  2. 2026-10-03 14:22 UTCEPSS rescore
  3. 2026-09-28 22:01 UTCEG score recompute
  4. 2026-09-27 21:51 UTCCISA KEV update
  5. 2026-09-25 19:35 UTCCISA KEV update
  6. 2026-09-25 14:55 UTCCISA KEV update
  7. 2026-09-24 19:31 UTCCISA KEV update
  8. 2026-09-22 19:36 UTCCISA KEV update
  9. 2026-09-21 19:09 UTCCISA KEV update
  10. 2026-09-18 19:26 UTCEG score recompute
  11. 2026-09-18 19:22 UTCEPSS rescore
  12. 2026-09-18 19:20 UTCCISA KEV update
  13. 2026-09-18 14:15 UTCCISA KEV update
  14. 2026-09-16 14:10 UTCCISA KEV update
  15. 2026-09-14 19:24 UTCCISA KEV update
  16. 2026-09-11 18:49 UTCCISA KEV update
  17. 2026-09-10 19:28 UTCCISA KEV update
  18. 2026-09-10 12:56 UTCEG score recompute
  19. 2026-09-09 19:08 UTCCISA KEV update
  20. 2026-09-08 18:54 UTCCISA KEV update
  21. 2026-09-06 17:14 UTCEG score recompute
  22. 2026-09-06 13:44 UTCEPSS rescore
  23. 2026-09-05 17:23 UTCEG score recompute
  24. 2026-09-05 15:24 UTCEPSS rescore
  25. 2026-09-04 17:38 UTCCISA KEV update
Show 75 more
  1. 2026-09-02 17:33 UTCCISA KEV update
  2. 2026-08-31 14:19 UTCCISA KEV update
  3. 2026-08-30 22:05 UTCEG score recompute
  4. 2026-08-30 19:13 UTCEPSS rescore
  5. 2026-08-28 22:19 UTCEG score recompute
  6. 2026-08-28 21:36 UTCEPSS rescore
  7. 2026-08-27 17:22 UTCCISA KEV update
  8. 2026-08-26 17:41 UTCCISA KEV update
  9. 2026-08-24 18:52 UTCCISA KEV update
  10. 2026-08-24 14:34 UTCEG score recompute
  11. 2026-08-24 14:11 UTCEPSS rescore
  12. 2026-08-22 02:57 UTCEG score recompute
  13. 2026-08-21 23:45 UTCEPSS rescore
  14. 2026-08-21 16:49 UTCCISA KEV update
  15. 2026-08-20 17:06 UTCCISA KEV update
  16. 2026-08-19 17:33 UTCCISA KEV update
  17. 2026-08-18 16:58 UTCCISA KEV update
  18. 2026-08-17 13:56 UTCCISA KEV update
  19. 2026-08-16 03:56 UTCEG score recompute
  20. 2026-08-16 02:10 UTCEPSS rescore
  21. 2026-08-11 19:32 UTCCISA KEV update
  22. 2026-08-10 17:03 UTCEG score recompute
  23. 2026-08-08 17:28 UTCEG score recompute
  24. 2026-08-08 16:33 UTCEPSS rescore
  25. 2026-08-07 17:09 UTCCISA KEV update
  26. 2026-08-05 17:25 UTCCISA KEV update
  27. 2026-08-04 17:02 UTCCISA KEV update
  28. 2026-08-03 19:22 UTCCISA KEV update
  29. 2026-07-30 10:53 UTCEG score recompute
  30. 2026-07-29 19:27 UTCCISA KEV update
  31. 2026-07-27 19:24 UTCCISA KEV update
  32. 2026-07-27 17:17 UTCCISA KEV update
  33. 2026-07-26 14:20 UTCEG score recompute
  34. 2026-07-23 01:42 UTCEG score recompute
  35. 2026-07-23 00:17 UTCEG score recompute
  36. 2026-07-22 22:22 UTCEG score recompute
  37. 2026-07-22 19:40 UTCCISA KEV update
  38. 2026-07-21 14:37 UTCCISA KEV update
  39. 2026-07-20 18:50 UTCEG score recompute
  40. 2026-07-20 17:04 UTCEPSS rescore
  41. 2026-07-20 17:04 UTCEPSS rescore
  42. 2026-07-17 07:26 UTCEG score recompute
  43. 2026-07-16 17:04 UTCCISA KEV update
  44. 2026-07-15 16:49 UTCCISA KEV update
  45. 2026-07-15 15:04 UTCCISA KEV update
  46. 2026-07-14 18:05 UTCCISA KEV update
  47. 2026-07-13 17:07 UTCCISA KEV update
  48. 2026-07-10 17:52 UTCCISA KEV update
  49. 2026-07-09 19:06 UTCEPSS rescore
  50. 2026-07-07 19:01 UTCCISA KEV update
  51. 2026-07-07 17:16 UTCCISA KEV update
  52. 2026-07-01 19:16 UTCCISA KEV update
  53. 2026-06-29 19:12 UTCCISA KEV update
  54. 2026-06-28 04:54 UTCEPSS rescore
  55. 2026-06-28 04:54 UTCEPSS rescore
  56. 2026-06-25 19:15 UTCCISA KEV update
  57. 2026-06-23 21:31 UTCEPSS rescore
  58. 2026-06-23 21:30 UTCEPSS rescore
  59. 2026-06-23 17:44 UTCCISA KEV update
  60. 2026-06-18 16:13 UTCCISA KEV update
  61. 2026-06-16 19:33 UTCCISA KEV update
  62. 2026-06-15 19:33 UTCCISA KEV update
  63. 2026-06-15 17:45 UTCEPSS rescore
  64. 2026-06-12 17:35 UTCCISA KEV update
  65. 2026-06-11 19:10 UTCCISA KEV update
  66. 2026-06-09 18:42 UTCCISA KEV update
  67. 2026-06-09 17:12 UTCCISA KEV update
  68. 2026-06-08 19:16 UTCCISA KEV update
  69. 2026-06-08 17:26 UTCCISA KEV update
  70. 2026-06-05 22:43 UTCCISA KEV update
  71. 2026-06-03 19:09 UTCCISA KEV update
  72. 2026-06-02 18:32 UTCCISA KEV update
  73. 2026-06-01 20:42 UTCCISA KEV update
  74. 2026-05-29 22:20 UTCCISA KEV update
  75. 2026-05-27 20:35 UTCCISA KEV update

Publicly available exploits

(6 references)

Working exploit code is in the public domain (1 Metasploit module) (2 GitHub PoCs) (2 Exploit-DB entries). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Exploit-DBEDB-48338✓ verified
    First seen Apr 16, 2020

    Apache Solr - Remote Code Execution via Velocity Template (Metasploit)

    Open source ↗
  • Metasploitexploit/multi/http/solr_velocity_rce✓ verified
    First seen Oct 29, 2019

    Apache Solr Remote Code Execution via Velocity Template

    Open source ↗
  • GitHub PoCMa1Dong/Solr_CVE-2019-17558
    First seen Aug 4, 2020

    Solr_CVE-2019-17558

    Open source ↗
  • GitHub PoCzhzyker/exphub
    First seen Apr 1, 2020

    Exphub[漏洞利用脚本库] 包括Webloigc、Struts2、Tomcat、Nexus、Solr、Jboss、Drupal的漏洞利用脚本，最新添加CVE-2020-14882、CVE-2020-11444、CVE-2020-10204、CVE-2020-10199、CVE-2020-1938、CVE-2020-2551、CVE-2020-2555、CVE-2020-2883、CVE-2019-17558、CVE-2019-6340

    Open source ↗
  • Exploit-DBEDB-47572
    First seen Nov 1, 2019

    Apache Solr 8.2.0 - Remote Code Execution

    Open source ↗
  • Nucleihttp/cves/2019/CVE-2019-17558.yaml
    First seen Jan 1, 2019

    Apache Solr <=8.3.1 - Remote Code Execution

    Open source ↗

Related CVEs(same product + same CWE)

Frequently asked(6)

What is CVE-2019-17558?
CVE-2019-17558 is a critical vulnerability published on December 30, 2019. 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…
When was CVE-2019-17558 disclosed?
CVE-2019-17558 was first published on December 30, 2019, with the most recent update on October 27, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2019-17558 actively exploited?
Yes. CISA added CVE-2019-17558 to the Known Exploited Vulnerabilities catalog on November 3, 2021, affecting Apache Solr. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate attention. A fix is available. Apply it.
What is the CVSS score of CVE-2019-17558?
CVE-2019-17558 has a CVSS v3 base score of 7.5 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.0 (CRITICAL).
Which products are affected by CVE-2019-17558?
CVE-2019-17558 affects Apache Solr. The affected packages EchelonGraph has on record, with version ranges, are listed in the Affected Packages section of this page.
How do I remediate CVE-2019-17558?
A fix for CVE-2019-17558 is available: update to the fixed version the vendor names in its advisory.

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