How severe is CVE-2024-45216?

CVE-2024-45216 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2024-45216 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 91% (100th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-45216?

CVE-2024-45216 affects Apache Solr. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2024-45216?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2024-45216 have an EU (EUVD) identifier?

Yes. CVE-2024-45216 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-3084.

When was CVE-2024-45216 published?

CVE-2024-45216 was published on 2024-10-16 and last updated on 2026-06-17.

CVE-2024-45216

CVE-2024-45216 is a critical-severity vulnerability in Apache Solr with a CVSS 3.x base score of 9.8. Its EPSS exploit-prediction score of 91% places it in the 100th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-287.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 91% (100th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-3084
Weakness: CWE-287
Affected product: Apache Solr
Published: 2024-10-16
Last modified: 2026-06-17

Description

Improper Authentication vulnerability in Apache Solr. Solr instances using the PKIAuthenticationPlugin, which is enabled by default when Solr Authentication is used, are vulnerable to Authentication bypass. A fake ending at the end of any Solr API URL path, will allow requests to skip Authentication while maintaining the API contract with the original URL Path. This fake ending looks like an unprotected API path, however it is stripped off internally after authentication but before API routing. This issue affects Apache Solr: from 5.3.0 before 8.11.4, from 9.0.0 before 9.7.0. Users are recommended to upgrade to version 9.7.0, or 8.11.4, which fix the issue.

Frequently asked questions

What is CVE-2024-45216?: Improper Authentication vulnerability in Apache Solr. Solr instances using the PKIAuthenticationPlugin, which is enabled by default when Solr Authentication is used, are vulnerable to Authentication bypass. A fake ending at the end of any Solr API URL path, will allow requests to skip Authentication while maintaining the API contract with the original URL Path. This fake ending looks like an unprotected API path, however it is stripped off internally after authentication but before API routing. This issue affects Apache Solr: from 5.3.0 before 8.11.4, from 9.0.0 before 9.7.0. Users are recommended to upgrade to version 9.7.0, or 8.11.4, which fix the issue.
How severe is CVE-2024-45216?: CVE-2024-45216 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2024-45216 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 91% (100th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-45216?: CVE-2024-45216 affects Apache Solr. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2024-45216?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2024-45216 have an EU (EUVD) identifier?: Yes. CVE-2024-45216 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-3084.
When was CVE-2024-45216 published?: CVE-2024-45216 was published on 2024-10-16 and last updated on 2026-06-17.

References

Affected products (1)

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

More vulnerabilities in Apache Solr

CVE-2021-44548 — Critical (CVSS 9.8): An Improper Input Validation vulnerability in DataImportHandler of Apache Solr allows an attacker to provide a Windows…
CVE-2021-27905 — Critical (CVSS 9.8): The ReplicationHandler (normally registered at "/replication" under a Solr core) in Apache Solr has a "masterUrl" (also…
CVE-2020-13957 — Critical (CVSS 9.8): Apache Solr versions 6.6.0 to 6.6.6, 7.0.0 to 7.7.3 and 8.0.0 to 8.6.2 prevents some features considered dangerous…
CVE-2019-12409 — Critical (CVSS 9.8): The 8.1.1 and 8.2.0 releases of Apache Solr contain an insecure setting for the ENABLE_REMOTE_JMX_OPTS configuration…
CVE-2019-0192 — Critical (CVSS 9.8): In Apache Solr versions 5.0.0 to 5.5.5 and 6.0.0 to 6.6.5, the Config API allows to configure the JMX server via an…
CVE-2017-12629 — Critical (CVSS 9.8): Remote code execution occurs in Apache Solr before 7.1 with Apache Lucene before 7.1 by exploiting XXE in conjunction…

All CVEs affecting Apache Solr →

Other CWE-287 (Improper Authentication) vulnerabilities

CVE-2026-45480 — Critical (CVSS 10.0): Improper authentication in Azure Active Directory allows an unauthorized attacker to elevate privileges over a network.
CVE-2026-46389 — Critical (CVSS 10.0): UDS Identity Config builds the Keycloak configuration image (realm, plugins, theme, truststore, JARs) consumed by UDS…
CVE-2026-10611 — Critical (CVSS 10.0): An authentication bypass vulnerability exists in MISP when LDAP mixed authentication is enabled with OTP enforcement.…
CVE-2026-47280 — Critical (CVSS 10.0): Improper authentication in Azure Resource Manager (ARM) allows an unauthorized attacker to elevate privileges over a…
CVE-2026-42822 — Critical (CVSS 10.0): Improper authentication in Azure Local Disconnected Operations allows an unauthorized attacker to elevate privileges…
CVE-2026-20182 — Critical (CVSS 10.0): May 2026: This security advisory provides the details and fix information for a vulnerability that was discovered and…

Browse all CWE-287 (Improper Authentication) vulnerabilities →