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CVE Record

CVE-2019-17558: Apache Solr 5.0.0 to Apache Solr 8.3.1 are vulnerable to a Remote Code Execution through the VelocityRespon...

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).

HighCVSS 7.5Known exploitedUpdated
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Glexia's TakeAutomated analysis

Security readout for executives and security teams

Apache Solr versions 5.0.0 through 8.3.1 can allow remote code execution through VelocityResponseWriter template handling. Exploitation requires a specific configuration path or trusted access to change Solr configuration, but impact can be full compromise of the Solr host. The provided bundle marks this CVE as KEV, so treat exposed legacy Solr as urgent. Exposure is most likely in Apache Solr 5.0.0 to 8.3.1, especially where the Config API is reachable, authentication is weak, user-defined configsets are allowed, or VelocityResponseWriter is enabled for template rendering. Internet-facing Solr administration endpoints raise business urgency. Prioritize remediation for internet-facing or externally reachable Solr systems this week, sooner if administration endpoints are exposed. KEV status means this is not theoretical. Internal-only systems still need review because successful exploitation can affect confidentiality, integrity, and availability of search infrastructure and hosted data. Mitigation focus: Upgrade Solr beyond the affected 5.0.0 to 8.3.1 range, following Apache guidance.; Prefer Solr 8.4 or later behavior for removed parameter template loading.; Restrict and authenticate Solr Config API access immediately..

Prepared

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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CVE-2019-17558 mapping review

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Vulnerability profileCVE Program record
Severity
High
CVSS
7.5 (3.1)
Known Exploited
Yes
Published

Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

1CVSS vectors
0Timeline events
0ADP providers
30Source links

CISA KEV status

Status
Known exploited
Source
CISA / ADP
Date added
Not provided

CVSS vector scores

1 official score

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
7.5CVSS 3.1HighCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H1.65.9Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

7.5High
CVSS 3.1 vector shape for CVE-2019-17558Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/aApache SolrApache Solr 5.0.0 to Apache Solr 8.3.1Listed
Weakness

CWE details

CWE-74

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