{"id":"CVE-2018-5521","aliases":["EUVD-2018-17290","GHSA-hm4q-f2xp-j2xx"],"status":"published","title":"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...","description":"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.","severity":{"version":"3.0","score":6.1,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.0089,"percentile":0.59604,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-79"],"published":"2018-06-01T14:00:00Z","modified":"2026-06-17T02:00:27Z","products":[{"vendor":"f5","product":"big-ip (ltm, aam, afm, analytics, apm, asm, dns, edge gateway, fps, gtm, link controller, pem, webaccelerator)"},{"vendor":"f5","product":"big-ip_access_policy_manager"},{"vendor":"f5","product":"big-ip_advanced_firewall_manager"},{"vendor":"f5","product":"big-ip_analytics"},{"vendor":"f5","product":"big-ip_application_acceleration_manager"},{"vendor":"f5","product":"big-ip_application_security_manager"},{"vendor":"f5","product":"big-ip_domain_name_system"},{"vendor":"f5","product":"big-ip_edge_gateway"},{"vendor":"f5","product":"big-ip_global_traffic_manager"},{"vendor":"f5","product":"big-ip_link_controller"},{"vendor":"f5","product":"big-ip_local_traffic_manager"},{"vendor":"f5","product":"big-ip_policy_enforcement_manager"},{"vendor":"f5","product":"big-ip_webaccelerator"},{"vendor":"f5","product":"big-ip_websafe"},{"vendor":"f5 networks, inc.","product":"big-ip (ltm, aam, afm, analytics, apm, asm, dns, edge gateway, fps, gtm, link controller, pem, webaccelerator)"}],"references":[{"url":"http://www.securitytracker.com/id/1041021","tags":["vdb-entry","x_refsource_SECTRACK","x_transferred","Third Party Advisory","VDB Entry"]},{"url":"https://support.f5.com/csp/article/K23124150","tags":["x_refsource_CONFIRM","x_transferred","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2018-5521"},{"url":"https://github.com/advisories/GHSA-hm4q-f2xp-j2xx"}],"sources":{"cve":[{"id":"CVE-2018-5521","description":"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.","status":"published","published":"2018-06-01T14:00:00Z","modified":"2024-09-17T01:06:55.468Z","updated_at":"2026-11-02T14:35:00.948726Z"}],"euvd":[{"id":"EUVD-2018-17290","description":"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.","status":"published","published":"2018-06-01T14:00:00Z","modified":"2024-09-17T01:06:55Z","updated_at":"2026-11-03T00:28:52.69419Z"}],"ghsa":[{"id":"GHSA-hm4q-f2xp-j2xx","title":"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...","description":"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.","status":"published","published":"2022-05-14T03:11:17Z","modified":"2023-02-02T05:07:25Z","cvss":[{"version":"3.0","score":6.1,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:52:30.062581Z"}],"nvd":[{"id":"CVE-2018-5521","description":"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.","status":"published","published":"2018-06-01T14:29:00.503Z","modified":"2026-06-17T02:00:27.637Z","cvss":[{"version":"3.0","score":6.1,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"primary"},{"version":"2.0","score":4.3,"vector":"AV:N/AC:M/Au:N/C:N/I:P/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:04:28.483469Z"}]}}