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TI-2020-12444 Aliases CVE-2020-15813GHSA-3gg9-f3vh-866f

Graylog before 3.3.3 lacks SSL Certificate Validation for LDAP servers.

Priority LOW 37CWE-295Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
High
Impact type
Spoofing
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-295.

Summary

Graylog before 3.3.3 lacks SSL Certificate Validation for LDAP servers. It allows use of an external user/group database stored in LDAP. The connection configuration allows the usage of unencrypted, SSL- or TLS-secured connections. Unfortunately, the Graylog client code (in all versions that support LDAP) does not implement proper certificate validation (regardless of whether the "Allow self-signed certificates" option is used). Therefore, any attacker with the ability to intercept network traffic between a Graylog server and an LDAP server is able to redirect traffic to a different LDAP server (unnoticed by the Graylog server due to the lack of certificate validation), effectively bypassing Graylog's authentication mechanism.

Why it matters now

EPSS 0.00779 56th percentileScored 2026-11-07
Fix Fixed org.graylog:graylog-parent (Maven): 3.3.3

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
—org.graylog:graylog-parent (Maven)before 3.3.33.3.3Patch availableGHSA-3gg9-f3vh-866f
  • — Vendor— Affected all versions Fixed in — No fix listed CNA
  • org.graylog:graylog-parent (Maven) Vendor— Affected before 3.3.3 Fixed in 3.3.3 Patch available GHSA-3gg9-f3vh-866f

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:graylog:graylog:*:*:*:*:*:*:*:*before 3.3.3VulnerableGraylog2
  • cpe:2.3:a:graylog:graylog:*:*:*:*:*:*:*:* Versions before 3.3.3 Vulnerable ·Graylog2

Remediation

  • Fix · GHSA-3gg9-f3vh-866f org.graylog:graylog-parent (Maven) Fixed in 3.3.3 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2020-15813
  2. 2026-10-03 Alias added: GHSA-3gg9-f3vh-866f

References

Advisory 2

Other 1

  • TI-2024-16341 graylog2-server vulnerable to instantiation of arbitrary classes triggered by API request CVSS 3.1HIGH 8.8
  • TI-2023-21671 Insecure source port usage for DNS queries in Graylog CVSS 3.1MEDIUM 5.3
  • TI-2026-01133 Incorrect management of session invalidation vulnerability in Graylog Web Interface CVSS 4.0CRITICAL 9.3
  • TI-2023-21667 User session is still usable after logout in graylog2-server CVSS 3.1LOW 3.1
  • TI-2021-15624 A Session ID leak in the audit log in Graylog before 4.1.2 allows attackers to escalate… CVSS 3.1CRITICAL 9.8
  • TI-2021-15623 A Session ID leak in the DEBUG log file in Graylog before 4.1.2 allows attackers to… CVSS 3.1CRITICAL 9.8
See all 21 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences