CVE-2019-17558

Exp

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).

Published: 2019-12-30 Last update: 2025-10-27 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2019-17558 is rated Critical Active Threat (90.2/100): CVSS High severity, with high exploitation likelihood (EPSS 94.47%, 100th percentile). CISA KEV confirms active exploitation (added 2021-11-03) affecting Apache / Solr. a weakness (CWE-74) Unauthenticated remote administrative access may be possible. The CISA remediation deadline has passed—treat as an emergency patch priority.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

CISA KEV Record for CVE-2019-17558

Name: Apache Solr VelocityResponseWriter Plug-In Remote Code Execution Vulnerability · CISA KEV detail

Exploit added: 2021-11-03

Action due: 2022-05-03

Required action: Apply updates per vendor instructions.

Public exploit references (Exploit-DB) for CVE-2019-17558

EDB-ID Source Kind Published Link
48338 exploit_db edb 2020-04-16 Exploit-DB ↗
47572 exploit_db edb 2019-11-01 Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2019-17558

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-11-21 94.31% 94.47% +0.16%
2 2025-11-18 94.46% 94.31% -0.15%
3 2025-03-17 — 94.46% —

Full EPSS history (6 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2019-17558

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 1.6 5.9 [email protected]
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 1.6 5.9 134c704f-9b21-4f2e-91b3-4a467353bcc0
4.6 2.0 MEDIUM
AV:N/AC:H/Au:S/C:P/I:P/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:H)
Exploitation requires uncommon or highly specific conditions.
Authentication (AU:S)
A single authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 3.9 6.4 [email protected]

Weakness enumeration for CVE-2019-17558

GitHub Security Advisory for CVE-2019-17558

GHSA-ww97-9w65-2crx · Severity: high · Ecosystem: maven — Improper Input Validation in Apache Solr

OS Trackers for CVE-2019-17558

vendor priority summary link
debian unimportant CVE-2019-17558 unimportant priority: Debian including 1 source packages (lucene-solr), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): open 5. https://security-tracker.debian.org/tracker/CVE-2019-17558
redhat medium — https://access.redhat.com/security/cve/CVE-2019-17558
ubuntu high CVE-2019-17558 high priority: Ubuntu including 1 source packages (lucene-solr), 16 status rows across 16 suites (bionic, disco, eoan, focal, groovy, hirsute, impish, jammy, kinetic, lunar, mantic, noble, oracular, trusty, upstream, xenial): ignored 8, not-affected 8. https://ubuntu.com/security/CVE-2019-17558

Affected software / configurations for CVE-2019-17558

Vendor Product Version Raw CPE
apache solr >= 5.0.0, < 7.7.3 cpe:2.3:a:apache:solr:*:*:*:*:*:*:*:*
apache solr >= 8.0.0, < 8.4.0 cpe:2.3:a:apache:solr:*:*:*:*:*:*:*:*
oracle primavera_unifier >= 17.7, <= 17.12 cpe:2.3:a:oracle:primavera_unifier:*:*:*:*:*:*:*:*
oracle primavera_unifier 16.1 cpe:2.3:a:oracle:primavera_unifier:16.1:*:*:*:*:*:*:*
oracle primavera_unifier 16.2 cpe:2.3:a:oracle:primavera_unifier:16.2:*:*:*:*:*:*:*
oracle primavera_unifier 18.8 cpe:2.3:a:oracle:primavera_unifier:18.8:*:*:*:*:*:*:*
oracle primavera_unifier 19.12 cpe:2.3:a:oracle:primavera_unifier:19.12:*:*:*:*:*:*:*

References for CVE-2019-17558

URL Tags
http://packetstormsecurity.com/files/157078/Apache-Solr-8.3.0-Velocity-Template-Remote-Code-Execution.html Exploit Third Party Advisory VDB Entry
https://issues.apache.org/jira/browse/SOLR-13971 Exploit Issue Tracking Patch Vendor Advisory
https://lists.apache.org/thread.html/r0b7b9d4113e6ec1ae1d3d0898c645f758511107ea44f0f3a1210c5d5%40%3Cissues.lucene.apache.org%3E Mailing List
https://lists.apache.org/thread.html/r12ab2cb15a34e49b4fecb5b2bdd7e10f3e8b7bf1f4f47fcde34d3a7c%40%3Cissues.lucene.apache.org%3E Mailing List
https://lists.apache.org/thread.html/r19d23e8640236a3058b4d6c23e5cd663fde182255f5a9d63e0606a66%40%3Cdev.lucene.apache.org%3E Mailing List
https://lists.apache.org/thread.html/r1d4a247329a8478073163567bbc8c8cb6b49c6bfc2bf58153a857af1%40%3Ccommits.druid.apache.org%3E Mailing List
https://lists.apache.org/thread.html/r204ba2a9ea750f38d789d2bb429cc0925ad6133deea7cbc3001d96b5%40%3Csolr-user.lucene.apache.org%3E Mailing List
https://lists.apache.org/thread.html/r25f1bd4545617f5b86dde27b4c30fec73117af65598a30e20209739a%40%3Cissues.lucene.apache.org%3E Mailing List
https://lists.apache.org/thread.html/r339865b276614661770c909be1dd7e862232e3ef0af98bfd85686b51%40%3Cdev.lucene.apache.org%3E Issue Tracking Mailing List
https://lists.apache.org/thread.html/r36e35fd76239a381643555966fb3e72139e018d52d76544fb42f96d8%40%3Cissues.lucene.apache.org%3E Issue Tracking Mailing List
https://lists.apache.org/thread.html/r5074d814d3a8c75df4b20e66bfd268ee0a73ddea7e85070cec3ae78d%40%3Cissues.lucene.apache.org%3E Exploit Mailing List
https://lists.apache.org/thread.html/r58c58fe51c87bc30ee13bb8b4c83587f023edb349018705208e65b37%40%3Cissues.lucene.apache.org%3E Mailing List
https://lists.apache.org/thread.html/r5dc200f7337093285bac40e6d5de5ea66597c3da343a0f7553f1bb12%40%3Csolr-user.lucene.apache.org%3E Mailing List
https://lists.apache.org/thread.html/r79c7e75f90e735fd32c4e3e97340625aab66c09dfe8c4dc0ab768b69%40%3Csolr-user.lucene.apache.org%3E Mailing List
https://lists.apache.org/thread.html/r7b89b3dcfc1b6c52dd8d610b897ac98408245040c92b484fe97a51a2%40%3Csolr-user.lucene.apache.org%3E Mailing List
https://lists.apache.org/thread.html/r7f21ab40a9b17b1a703db84ac56773fcabacd4cc1eb5c4700d17c071%40%3Cissues.lucene.apache.org%3E Mailing List
https://lists.apache.org/thread.html/r8a36e4f92f4449dec517e560e1b55639f31b3aca26c37bbad45e31de%40%3Cissues.lucene.apache.org%3E Mailing List
https://lists.apache.org/thread.html/r8e7a3c253a695a7667da0b0ec57f9bb0e31f039e62afbc00a1d96f7b%40%3Csolr-user.lucene.apache.org%3E Mailing List
https://lists.apache.org/thread.html/r9271d030452170ba6160c022757e1b5af8a4c9ccf9e04164dec02e7f%40%3Cissues.lucene.apache.org%3E Mailing List
https://lists.apache.org/thread.html/r99c3f7ec3a079e2abbd540ecdb55a0e2a0f349ca7084273a12e87aeb%40%3Cissues.lucene.apache.org%3E Mailing List
https://lists.apache.org/thread.html/ra29fa6ede5184385bf2c63e8ec054990a7d4622bba1d244bee70d82d%40%3Cissues.lucene.apache.org%3E Mailing List
https://lists.apache.org/thread.html/rafc939fdd753f55707841cd5886fc7fcad4d8d8ba0c72429b3220a9a%40%3Cissues.lucene.apache.org%3E Mailing List
https://lists.apache.org/thread.html/rb964fe5c4e3fc05f75e8f74bf6b885f456b7a7750c36e9a8045c627a%40%3Cissues.lucene.apache.org%3E Mailing List
https://lists.apache.org/thread.html/rc400db37710ee79378b6c52de3640493ff538c2beb41cefdbbdf2ab8%40%3Ccommits.submarine.apache.org%3E Mailing List
https://lists.apache.org/thread.html/rde3dbd8e646dabf8bef1b097e9a13ee0ecbdb8441aaed6092726c98d%40%3Cissues.ambari.apache.org%3E Mailing List
https://lists.apache.org/thread.html/re8d12db916b5582a23ed144b9c5abd0bea0be1649231aa880f6cbfff%40%3Cissues.lucene.apache.org%3E Mailing List
https://lists.apache.org/thread.html/rf5230a049d989dbfdd404b4320a265dceeeba459a4d04ec21873bd55%40%3Csolr-user.lucene.apache.org%3E Mailing List
https://lists.apache.org/thread.html/rf6d7ffae2b940114324e036b6394beadf27696d051ae0c4a5edf07af%40%3Cissues.lucene.apache.org%3E Exploit Mailing List
https://www.oracle.com/security-alerts/cpuoct2020.html Third Party Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-17558 US Government Resource
cvelogic Threat Intelligence