CVE-2019-17558
HighExploitedPublic exploitImproper Input Validation in Apache Solr
Published Feb 12, 2020 · Updated Aug 4, 2026 · Also known as DEBIAN-CVE-2019-17558, GHSA-ww97-9w65-2crx
Key Facts
Patch immediately- CVE-2019-17558 is a high-severity vulnerability (CVSS 7.5 v3.1) affecting Solr (Apache), Primavera Unifier (Oracle), lucene-solr (debian) and 1 more product.
- It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Nov 3, 2021. Public exploit code is available.
- EPSS estimates a 99% probability of exploitation in the next 30 days.
- Fixed versions are available, including Solr 7.7.3, Primavera Unifier <=17.12, org.apache.solr:solr-core 8.4.0.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v3.1
7.5
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
99%
Higher than 99.9% of all scored CVEs
Exploited in the wild
Yes
4 catalog listings
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2019-17558 brief as a PDF
Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.
Description
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).
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| CISA KEV | Nov 3, 2021 | May 3, 2022 | Not reported |
| Industry KEV feed | Nov 3, 2021 | May 3, 2022 | Not reported |
| CIRCL KEV | Nov 3, 2021 | May 3, 2022 | Not reported |
| ENISA EUVD | Nov 3, 2021 | n/a | Not reported |
Required action: Apply updates per vendor instructions.
Affected Products
19 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| SolrApache | >= Apache Solr 5.0.0 to Apache Solr 8.3.1 | 7.7.3 |
| Primavera UnifierOracle | 16.1, 16.2, 18.8, 19.12 | 17.12 |
| lucene-solrdebian | See advisory | n/a |
| org.apache.solr:solr-coremaven | >= 5.0.0 | 8.4.0 |
Patched Releases
Solr
7.7.3
Primavera Unifier
<=17.12
org.apache.solr:solr-core
8.4.0
Timeline
Publicly disclosed
Feb 12, 2020
Added to CISA KEV
Nov 3, 2021
Added to Industry KEV feed
Nov 3, 2021
Added to CIRCL KEV
Nov 3, 2021
Added to ENISA EUVD
Nov 3, 2021
Last updated
Aug 4, 2026
Weakness Type
- CWE-20 Improper Input Validation
- CWE-74 Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
- CWE-94 Improper Control of Generation of Code ('Code Injection')
References
- advisoryGHSA advisory
- advisoryhttps://nvd.nist.gov/vuln/detail/CVE-2019-17558
- advisoryhttps://security-tracker.debian.org/tracker/CVE-2019-17558
- advisoryhttps://www.ibm.com/blogs/psirt/security-bulletin-apache-solr-shipped-with-ibm-operations-analytics-log-analysis-susceptible-to-vulnerability-in-apache-poi-cve-2019-12415/
- advisoryhttps://www.ibm.com/blogs/psirt/security-bulletin-multiple-vulnerabilities-in-eclipse-jetty-affect-apache-solr-shipped-with-ibm-operations-analytics-log-analysis/
FAQ
Common Questions.
Apache Solr 5.0.0 to Apache Solr 8.3.1 are vulnerable to a Remote Code Execution through the VelocityResponseWriter.
Affected: Solr (Apache) versions >= Apache Solr 5.0.0 to Apache Solr 8.3.1; Primavera Unifier (Oracle) versions 16.1, 16.2, 18.8, 19.12; lucene-solr (debian), among others. The full list is in the CVE brief.
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Nov 3, 2021.
Yes. It was added on Nov 3, 2021 with a federal remediation due date of May 3, 2022.
Public exploit code is available.
Fixed versions are available, including Solr 7.7.3, Primavera Unifier <=17.12, org.apache.solr:solr-core 8.4.0.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
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