CVE-2019-17558

What it is

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).

At a glance

Exploitability

Can be exploited over the network with a low-privilege account. High risk of data exposure, data tampering, service disruption.

In the wild

CISA lists this as exploited in real attacks. Treat as urgent.

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2019-10-14 00:00 UTC ReservedThe CVE id was reserved by its CNA
2. 2019-12-30 17:15 UTC PublishedDisclosed publicly on CVE.org and NVD
3. 2021-11-03 Exploited in the wildAdded to CISA's Known Exploited Vulnerabilities list
4. 2022-05-03 Remediation deadlineCISA's due date for federal agencies to fix it
5. 2026-06-17 02:24 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: yes, CISA lists it. This puts it above everything that is not.
• Exploit odds: 98.6% in the next 30 days (EPSS).
• Severity: 7.5 HIGH (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2019-12-30 17:15 UTC

Last modified

2026-06-17 02:24 UTC

Added to CISA KEV

2021-11-03

Exploit probability

98.6% · EPSS, next 30 days

Weakness

CWE-74

Record status

Analyzed

Affected

• Apache Solr < 7.7.3
• Apache Solr < 8.4.0
• Oracle Primavera Unifier ≤ 17.12
• Oracle Primavera Unifier 16.1
• Oracle Primavera Unifier 16.2
• Oracle Primavera Unifier 18.8
• Oracle Primavera Unifier 19.12

Attack profile CVSS 3.1 · 7.5

Attack vector

Network

Complexity

High

Privileges needed

Low

User interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2019-17558.md and follow it. Check whether this project is affected by CVE-2019-17558. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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