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TI-2021-05877 Aliases CVE-2021-23018GHSA-gc3v-3qpp-57w4

Cleartext transmission of sensitive information in Nginx Controller

Priority LOW 33CWE-319Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
High
Impact type
Information disclosure
Confidentiality · integrity · availability
High · High · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-319.

Summary

Intra-cluster communication does not use TLS. The services within the NGINX Controller 3.x before 3.4.0 namespace are using cleartext protocols inside the cluster.

Why it matters now

EPSS 0.00544 45th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

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

Affected products

VendorProductAffected versionsFixed inStatusSource
—Nginx Controller"3.x before 3.4.0"—No fix listedCNA
  • Nginx Controller Vendor— Affected "3.x before 3.4.0" Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:f5:nginx_controller:*:*:*:*:*:*:*:*3.0.0 – 3.4.0VulnerableF5
  • cpe:2.3:a:f5:nginx_controller:*:*:*:*:*:*:*:* Versions 3.0.0 – 3.4.0 Vulnerable ·F5

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-23018
  2. 2026-10-03 Alias added: GHSA-gc3v-3qpp-57w4

References

Advisory 1

  • TI-2020-16818 Path traversal in NGINX Controller CVSS 3.1CRITICAL 9.8
  • TI-2020-04819 Cross-site scripting in NGINX Controller CVSS 3.1CRITICAL 9.6
  • TI-2020-04781 In NGINX Controller versions prior to 3.2.0, an unauthenticated attacker with network… CVSS 3.1HIGH 8.6
  • TI-2020-04818 Cross-site request forgery in NGINX Controller CVSS 3.1HIGH 8.8
  • TI-2020-04812 Session fixation in NGINX Controller CVSS 3.1HIGH 8.1
  • TI-2020-04785 Cleartext transmission of sensitive information in NGINX Controller CVSS 3.1HIGH 8.1
See all 17 →

Sources

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