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CVE-2023-50298

Apache Solr: Solr can expose ZooKeeper credentials via Streaming Expressions

HIGH
7.5
CVSS Score
Published: February 9, 2024 at 05:29 PM UTC
Updated: June 17, 2026 at 06:39 AM UTC
1 product affected across 1 vendorSolr

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Severity
HIGH7.5
Exploit prediction
EPSS 2%
SSVC
No known exploit

Description

Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Apache Solr.This issue affects Apache Solr: from 6.0.0 through 8.11.2, from 9.0.0 before 9.4.1. Solr Streaming Expressions allows users to extract data from other Solr Clouds, using a "zkHost" parameter. When original SolrCloud is setup to use ZooKeeper credentials and ACLs, they will be sent to whatever "zkHost" the user provides. An attacker could setup a server to mock ZooKeeper, that accepts ZooKeeper requests with credentials and ACLs and extracts the sensitive information, then send a streaming expression using the mock server's address in "zkHost". Streaming Expressions are exposed via the "/streaming" handler, with "read" permissions. Users are recommended to upgrade to version 8.11.3 or 9.4.1, which fix the issue. From these versions on, only zkHost values that have the same server address (regardless of chroot), will use the given ZooKeeper credentials and ACLs when connecting.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Solr· Apachemaven
95%
6.0.0 ≤ v ≤ 8.11.26.0.0 ≤ v < 8.11.39.0.0 ≤ v < 9.4.16.0.09.0.0
Affected range stops below 8.11.3, so it looks safe — our inference, not a vendor statement
Affected range stops below 9.4.1, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (3)

Mailing List
Source: [email protected]
http://www.openwall.com/lists/oss-security/2024/02/09/2
Mailing List
Source: [email protected]
http://www.openwall.com/lists/oss-security/2024/02/09/3
Vendor AdvisoryThird Party Advisory
Source: [email protected]
https://solr.apache.org/security.html#cve-2023-50298-apache-solr-can-expose-zookeeper-credentials-via-streaming-expressions

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.5HIGHCISA-ADP
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-200NVD-CWE-noinfoCWE-922

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