CISA KEV · Known exploitedHigh

CVE-2019-17558

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 `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 resour...

CVSS: 7.5
EPSS: 98.6%
CISA KEV: Listed
Published: 2019.12.31

PRIORITY ASSESSMENT

Immediate review

CISA has listed this vulnerability in the Known Exploited Vulnerabilities catalog.

Known exploitationConfirmed by CISA KEV

Exploit probability98.6%

Technical severityCVSS 7.5

Vulnerability overview

Affected product and versions

Product: Apache Solr
Affected versions: Apache Solr 5.0.0 to Apache Solr 8.3.1, >= 5.0.0 < 7.7.3, >= 8.0.0 < 8.4.0, >= 17.7 <= 17.12, 16.1, 16.2, 18.8, 19.12
Fixed versions: 7.7.3, 8.4.0

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide

CISA required action

Apply updates per vendor instructions.

Due date: 2022.05.03

1
Identify
Confirm that Apache Solr and an affected version are present.
2
Prioritize
Combine exploitation signals with asset exposure and business criticality.
3
Remediate
Follow the vendor advisory or supported update path and preserve rollback options.
4
Verify
Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE: CWE-74
KEV added: 2021.11.03
Ransomware use: 미확인