What’s Vulnerable › Vulnerabilities

CVE-2017-8441

• Severity: medium (CVSS 4.3 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2017-06-05 · updated 2026-06-17
• Weakness: CWE-279

Description

Elastic X-Pack Security versions prior to 5.4.1 and 5.3.3 did not always correctly apply Document Level Security to index aliases. This bug could allow a user with restricted permissions to view data they should not have access to when performing certain operations against an index alias.

Affected products

• Elastic X-Pack Security: from 5.3.0 before 5.3.3; from 5.4.0 before 5.4.1 — fixed in 5.3.3, 5.4.1

How to fix

Upgrade to a fixed version: Elastic X-Pack Security 5.3.3, 5.4.1. Check the vendor advisory for mitigations.

References

• https://discuss.elastic.co/t/elastic-stack-5-4-1-and-5-3-3-security-updates/87952
• https://www.elastic.co/blog/elasticsearch-5-4-1-and-5-3-3-released
• https://www.elastic.co/community/security
• https://discuss.elastic.co/t/elastic-stack-5-4-1-and-5-3-3-security-updates/87952
• https://www.elastic.co/blog/elasticsearch-5-4-1-and-5-3-3-released
• https://www.elastic.co/community/security

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