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Vulnerabilities

Vulnerability · CVE-2019-17558

Apache Solr VelocityResponseWriter Plug-In Remote Code Execution Vulnerability

Published Dec 30, 2019 · catalog updated Jun 16, 2026 · Apache Solr

Patch now

CVE-2019-17558 is in the CISA known-exploited catalog, due May 3, 2022. Confirm Apache Solr against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Severity
High7.5
Known exploitation
CISA KEV and VulnCheck KEV
EPSS
98.57%
Remediation
Remediation guidance
Affected products
cpe apache/solr · cpe oracle/primavera unifier · vendor Apache Solr

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 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 by defining a response writer with that setting set to . 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 (has been uploaded by an authenticated user).

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe apache/solrversion unspecified
  • cpe oracle/primavera unifier16.1
  • cpe oracle/primavera unifier16.2
  • cpe oracle/primavera unifier18.8
  • cpe oracle/primavera unifier19.12
  • vendor Apache Solrversion unspecified

How to fix CVE-2019-17558

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2019-17558 is in the CISA known-exploited catalog, due May 3, 2022. Confirm Apache Solr against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Which versions are affected?

Compare what you have installed with oracle/primavera unifier 16.1; oracle/primavera unifier 16.2; oracle/primavera unifier 18.8; oracle/primavera unifier 19.12. Apply updates per vendor instructions.

What should an analyst verify?

CWE-74: Injection. EPSS 98.57%. The CISA KEV listing is the exploitation evidence. A public exploit reference is linked in Sources. That is not the same as confirmed exploitation. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Dec 30, 2019 · Catalog

    Detected

    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 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 by defi

  2. Nov 3, 2021 · CISA KEV

    Known exploited

    Apply updates per vendor instructions.

  3. May 3, 2022 · CISA KEV

    Remediation due

    Apply updates per vendor instructions.

  4. Jun 16, 2026 · Catalog

    Updated

    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 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 by defi

Sources

  • CISA KEVConfirmed exploitationCVE-2019-17558

    The Apache Solr VelocityResponseWriter plug-in contains an unspecified vulnerability which can allow for remote code execution.

    cisa.gov
  • CVE.orgVulnerability recordCVE-2019-17558

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2019-17558

    30-day exploitation probability 98.6%

    first.org
  • Exploit DatabasePublic exploit reference47572

    Public archive entry. The exploit body is not stored here.

    exploit-db.com
  • Exploit DatabasePublic exploit reference48338

    Public archive entry. The exploit body is not stored here.

    exploit-db.com
  • Metasploit ModulesPublic exploit moduleexploit_multi/http/solr_velocity_rce

    Public module reference (excellent). Module source is not copied into this catalog.

    rapid7.com
  • NIST NVDVulnerability recordCVE-2019-17558

    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 directory or as a parameter. A user defined configset could contain rende

    nvd.nist.gov
  • Packet Storm SecurityCited referencehttp://packetstormsecurity.com/files/157078/Apache-Solr-8.3.0-Velocity-Template-Remote-Code-Execution.html

    Packet Storm link already published on the finding.

    packetstormsecurity.com
  • VulnCheck KEVConfirmed exploitationCVE-2019-17558

    The Apache Solr VelocityResponseWriter plug-in contains an unspecified vulnerability which can allow for remote code execution.

    vulncheck.com

References

Freshness

Last verified in this catalog Oct 17, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.