What’s Vulnerable › Vulnerabilities

CVE-2021-37759

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-07-31 · updated 2026-06-17
• Weakness: CWE-532

Description

A Session ID leak in the DEBUG log file in Graylog before 4.1.2 allows attackers to escalate privileges (to the access level of the leaked session ID).

Affected products

• graylog2-server: from 0.20.0 before 4.1.2 — fixed in 4.1.2

How to fix

Upgrade to a fixed version: graylog2-server 4.1.2. Check the vendor advisory for mitigations.

References

• https://www.graylog.org/post/announcing-graylog-v4-1-2
• https://www.graylog.org/post/announcing-graylog-v4-1-2

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