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TI-2018-04026 Aliases CVE-2018-5521GHSA-hm4q-f2xp-j2xx

Cross-site scripting in F5 BIG-IP

Priority LOW 29CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Cross-site scripting
Confidentiality · integrity · availability
Low · Low · None
Fix status
No fix listed

Attack profile from CVSS 3.0 · NVD. Fix status from CNA. Impact type from CWE-79.

Summary

On F5 BIG-IP 12.1.0-12.1.3.1, 11.6.1-11.6.3.1, 11.5.1-11.5.5, or 11.2.1, carefully crafted URLs can be used to reflect arbitrary content into GeoIP lookup responses, potentially exposing clients to XSS.

Why it matters now

EPSS 0.0089 59th 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
F5BIG-IP (LTM, AAM, AFM, Analytics, APM, ASM, DNS, Edge Gateway, FPS, GTM, Link Controller, PEM, WebAccelerator)12.1.0-12.1.3.1; 11.6.1-11.6.3.1; 11.5.1-11.5.5; 11.2.1—No fix listedCNA
  • BIG-IP (LTM, AAM, AFM, Analytics, APM, ASM, DNS, Edge Gateway, FPS, GTM, Link Controller, PEM, WebAccelerator) VendorF5 Affected 12.1.0-12.1.3.1; 11.6.1-11.6.3.1; 11.5.1-11.5.5; 11.2.1 Fixed in — No fix listed CNA

CPE configurations NVD · 26

CPEVersionsRoleVendor
cpe:2.3:a:f5:big-ip_application_acceleration_manager:*:*:*:*:*:*:*:*11.5.1 – 11.5.5; 11.6.1 – 11.6.3; 12.1.0 – 12.1.3VulnerableF5
cpe:2.3:a:f5:big-ip_application_acceleration_manager:11.2.1:*:*:*:*:*:*:*11.2.1VulnerableF5
cpe:2.3:a:f5:big-ip_local_traffic_manager:*:*:*:*:*:*:*:*11.5.1 – 11.5.5; 11.6.1 – 11.6.3; 12.1.0 – 12.1.3VulnerableF5
cpe:2.3:a:f5:big-ip_local_traffic_manager:11.2.1:*:*:*:*:*:*:*11.2.1VulnerableF5
cpe:2.3:a:f5:big-ip_advanced_firewall_manager:*:*:*:*:*:*:*:*11.5.1 – 11.5.5; 11.6.1 – 11.6.3; 12.1.0 – 12.1.3VulnerableF5
cpe:2.3:a:f5:big-ip_advanced_firewall_manager:11.2.1:*:*:*:*:*:*:*11.2.1VulnerableF5
cpe:2.3:a:f5:big-ip_analytics:*:*:*:*:*:*:*:*11.5.1 – 11.5.5; 11.6.1 – 11.6.3; 12.1.0 – 12.1.3VulnerableF5
cpe:2.3:a:f5:big-ip_analytics:11.2.1:*:*:*:*:*:*:*11.2.1VulnerableF5
cpe:2.3:a:f5:big-ip_access_policy_manager:*:*:*:*:*:*:*:*11.5.1 – 11.5.5; 11.6.1 – 11.6.3; 12.1.0 – 12.1.3VulnerableF5
cpe:2.3:a:f5:big-ip_access_policy_manager:11.2.1:*:*:*:*:*:*:*11.2.1VulnerableF5
  • cpe:2.3:a:f5:big-ip_application_acceleration_manager:*:*:*:*:*:*:*:* Versions 11.5.1 – 11.5.5; 11.6.1 – 11.6.3; 12.1.0 – 12.1.3 Vulnerable ·F5
  • cpe:2.3:a:f5:big-ip_application_acceleration_manager:11.2.1:*:*:*:*:*:*:* Versions 11.2.1 Vulnerable ·F5
  • cpe:2.3:a:f5:big-ip_local_traffic_manager:*:*:*:*:*:*:*:* Versions 11.5.1 – 11.5.5; 11.6.1 – 11.6.3; 12.1.0 – 12.1.3 Vulnerable ·F5
  • cpe:2.3:a:f5:big-ip_local_traffic_manager:11.2.1:*:*:*:*:*:*:* Versions 11.2.1 Vulnerable ·F5
  • cpe:2.3:a:f5:big-ip_advanced_firewall_manager:*:*:*:*:*:*:*:* Versions 11.5.1 – 11.5.5; 11.6.1 – 11.6.3; 12.1.0 – 12.1.3 Vulnerable ·F5
  • cpe:2.3:a:f5:big-ip_advanced_firewall_manager:11.2.1:*:*:*:*:*:*:* Versions 11.2.1 Vulnerable ·F5
  • cpe:2.3:a:f5:big-ip_analytics:*:*:*:*:*:*:*:* Versions 11.5.1 – 11.5.5; 11.6.1 – 11.6.3; 12.1.0 – 12.1.3 Vulnerable ·F5
  • cpe:2.3:a:f5:big-ip_analytics:11.2.1:*:*:*:*:*:*:* Versions 11.2.1 Vulnerable ·F5
  • cpe:2.3:a:f5:big-ip_access_policy_manager:*:*:*:*:*:*:*:* Versions 11.5.1 – 11.5.5; 11.6.1 – 11.6.3; 12.1.0 – 12.1.3 Vulnerable ·F5
  • cpe:2.3:a:f5:big-ip_access_policy_manager:11.2.1:*:*:*:*:*:*:* Versions 11.2.1 Vulnerable ·F5
Show 16 more CPE
CPEVersionsRoleVendor
cpe:2.3:a:f5:big-ip_application_security_manager:*:*:*:*:*:*:*:*11.5.1 – 11.5.5; 11.6.1 – 11.6.3; 12.1.0 – 12.1.3VulnerableF5
cpe:2.3:a:f5:big-ip_application_security_manager:11.2.1:*:*:*:*:*:*:*11.2.1VulnerableF5
cpe:2.3:a:f5:big-ip_domain_name_system:*:*:*:*:*:*:*:*11.5.1 – 11.5.5; 11.6.1 – 11.6.3; 12.1.0 – 12.1.3VulnerableF5
cpe:2.3:a:f5:big-ip_domain_name_system:11.2.1:*:*:*:*:*:*:*11.2.1VulnerableF5
cpe:2.3:a:f5:big-ip_edge_gateway:*:*:*:*:*:*:*:*11.5.1 – 11.5.5; 11.6.1 – 11.6.3; 12.1.0 – 12.1.3VulnerableF5
cpe:2.3:a:f5:big-ip_edge_gateway:11.2.1:*:*:*:*:*:*:*11.2.1VulnerableF5
cpe:2.3:a:f5:big-ip_global_traffic_manager:*:*:*:*:*:*:*:*11.5.1 – 11.5.5; 11.6.1 – 11.6.3; 12.1.0 – 12.1.3VulnerableF5
cpe:2.3:a:f5:big-ip_global_traffic_manager:11.2.1:*:*:*:*:*:*:*11.2.1VulnerableF5
cpe:2.3:a:f5:big-ip_link_controller:*:*:*:*:*:*:*:*11.5.1 – 11.5.5; 11.6.1 – 11.6.3; 12.1.0 – 12.1.3VulnerableF5
cpe:2.3:a:f5:big-ip_link_controller:11.2.1:*:*:*:*:*:*:*11.2.1VulnerableF5
cpe:2.3:a:f5:big-ip_policy_enforcement_manager:*:*:*:*:*:*:*:*11.5.1 – 11.5.5; 11.6.1 – 11.6.3; 12.1.0 – 12.1.3VulnerableF5
cpe:2.3:a:f5:big-ip_policy_enforcement_manager:11.2.1:*:*:*:*:*:*:*11.2.1VulnerableF5
cpe:2.3:a:f5:big-ip_webaccelerator:*:*:*:*:*:*:*:*11.5.1 – 11.5.5; 11.6.1 – 11.6.3; 12.1.0 – 12.1.3VulnerableF5
cpe:2.3:a:f5:big-ip_webaccelerator:11.2.1:*:*:*:*:*:*:*11.2.1VulnerableF5
cpe:2.3:a:f5:big-ip_websafe:*:*:*:*:*:*:*:*11.5.1 – 11.5.5; 11.6.1 – 11.6.3; 12.1.0 – 12.1.3VulnerableF5
cpe:2.3:a:f5:big-ip_websafe:11.2.1:*:*:*:*:*:*:*11.2.1VulnerableF5
  • cpe:2.3:a:f5:big-ip_application_security_manager:*:*:*:*:*:*:*:* Versions 11.5.1 – 11.5.5; 11.6.1 – 11.6.3; 12.1.0 – 12.1.3 Vulnerable ·F5
  • cpe:2.3:a:f5:big-ip_application_security_manager:11.2.1:*:*:*:*:*:*:* Versions 11.2.1 Vulnerable ·F5
  • cpe:2.3:a:f5:big-ip_domain_name_system:*:*:*:*:*:*:*:* Versions 11.5.1 – 11.5.5; 11.6.1 – 11.6.3; 12.1.0 – 12.1.3 Vulnerable ·F5
  • cpe:2.3:a:f5:big-ip_domain_name_system:11.2.1:*:*:*:*:*:*:* Versions 11.2.1 Vulnerable ·F5
  • cpe:2.3:a:f5:big-ip_edge_gateway:*:*:*:*:*:*:*:* Versions 11.5.1 – 11.5.5; 11.6.1 – 11.6.3; 12.1.0 – 12.1.3 Vulnerable ·F5
  • cpe:2.3:a:f5:big-ip_edge_gateway:11.2.1:*:*:*:*:*:*:* Versions 11.2.1 Vulnerable ·F5
  • cpe:2.3:a:f5:big-ip_global_traffic_manager:*:*:*:*:*:*:*:* Versions 11.5.1 – 11.5.5; 11.6.1 – 11.6.3; 12.1.0 – 12.1.3 Vulnerable ·F5
  • cpe:2.3:a:f5:big-ip_global_traffic_manager:11.2.1:*:*:*:*:*:*:* Versions 11.2.1 Vulnerable ·F5
  • cpe:2.3:a:f5:big-ip_link_controller:*:*:*:*:*:*:*:* Versions 11.5.1 – 11.5.5; 11.6.1 – 11.6.3; 12.1.0 – 12.1.3 Vulnerable ·F5
  • cpe:2.3:a:f5:big-ip_link_controller:11.2.1:*:*:*:*:*:*:* Versions 11.2.1 Vulnerable ·F5
  • cpe:2.3:a:f5:big-ip_policy_enforcement_manager:*:*:*:*:*:*:*:* Versions 11.5.1 – 11.5.5; 11.6.1 – 11.6.3; 12.1.0 – 12.1.3 Vulnerable ·F5
  • cpe:2.3:a:f5:big-ip_policy_enforcement_manager:11.2.1:*:*:*:*:*:*:* Versions 11.2.1 Vulnerable ·F5
  • cpe:2.3:a:f5:big-ip_webaccelerator:*:*:*:*:*:*:*:* Versions 11.5.1 – 11.5.5; 11.6.1 – 11.6.3; 12.1.0 – 12.1.3 Vulnerable ·F5
  • cpe:2.3:a:f5:big-ip_webaccelerator:11.2.1:*:*:*:*:*:*:* Versions 11.2.1 Vulnerable ·F5
  • cpe:2.3:a:f5:big-ip_websafe:*:*:*:*:*:*:*:* Versions 11.5.1 – 11.5.5; 11.6.1 – 11.6.3; 12.1.0 – 12.1.3 Vulnerable ·F5
  • cpe:2.3:a:f5:big-ip_websafe:11.2.1:*:*:*:*:*:*:* Versions 11.2.1 Vulnerable ·F5

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2018-5521
  2. 2026-10-03 Alias added: GHSA-hm4q-f2xp-j2xx

References

Advisory 1

  • TI-2023-25230 BIG-IP Configuration utility unauthenticated remote code execution vulnerability KEVCVSS 3.1CRITICAL 9.8
  • TI-2022-01269 Missing authentication in F5 BIG-IP KEVCVSS 3.1CRITICAL 9.8
  • TI-2021-05850 Memory corruption in BIG-IP KEVCVSS 3.1CRITICAL 9.8
  • TI-2021-05845 Server-side request forgery in BIG-IP; BIG-IQ KEVCVSS 3.1CRITICAL 9.8
  • TI-2020-04820 Path traversal in BIG-IP KEVCVSS 3.1CRITICAL 9.8
  • TI-2014-05975 GNU Bash through 4.3 bash43-025 processes trailing strings after certain malformed… KEVCVSS 3.1CRITICAL 9.8
See all 629 →

Sources

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