How severe is CVE-2018-11802?

CVE-2018-11802 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2018-11802 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (79th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-11802?

CVE-2018-11802 affects Apache Solr. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-11802?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2018-11802 published?

CVE-2018-11802 was published on 2020-04-01 and last updated on 2026-06-17.

CVE-2018-11802

CVE-2018-11802 is a medium-severity vulnerability in Apache Solr with a CVSS 3.x base score of 4.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-863.

Key facts

Severity: Medium (CVSS 3.x base score 4.3)
CVSS v2: 4.0
EPSS exploit prediction: 2% (79th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-863
Affected product: Apache Solr
Published: 2020-04-01
Last modified: 2026-06-17

Description

In Apache Solr, the cluster can be partitioned into multiple collections and only a subset of nodes actually host any given collection. However, if a node receives a request for a collection it does not host, it proxies the request to a relevant node and serves the request. Solr bypasses all authorization settings for such requests. This affects all Solr versions prior to 7.7 that use the default authorization mechanism of Solr (RuleBasedAuthorizationPlugin).

Frequently asked questions

What is CVE-2018-11802?: In Apache Solr, the cluster can be partitioned into multiple collections and only a subset of nodes actually host any given collection. However, if a node receives a request for a collection it does not host, it proxies the request to a relevant node and serves the request. Solr bypasses all authorization settings for such requests. This affects all Solr versions prior to 7.7 that use the default authorization mechanism of Solr (RuleBasedAuthorizationPlugin).
How severe is CVE-2018-11802?: CVE-2018-11802 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2018-11802 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (79th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-11802?: CVE-2018-11802 affects Apache Solr. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-11802?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2018-11802 published?: CVE-2018-11802 was published on 2020-04-01 and last updated on 2026-06-17.

References

https://www.openwall.com/lists/oss-security/2019/04/24/1

Affected products (1)

cpe:2.3:a:apache:solr:*:*:*:*:*:*:*:*

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