{"id":"CVE-2026-33403","aliases":["EUVD-2026-19279","GHSA-7xqw-r9pr-qv59"],"status":"published","title":"Pi-hole has a Reflected XSS / HTML injection in taillog.js","description":"Pi-hole Admin Interface is a web interface for managing Pi-hole, a network-level ad and internet tracker blocking application. From 6.0 to before 6.5, a reflected DOM-based XSS vulnerability in taillog.js allows an unauthenticated attacker to inject arbitrary HTML into the Pi-hole admin interface by crafting a malicious URL. The file query parameter is interpolated into an innerHTML assignment without escaping. Because the Content-Security-Policy is missing the form-action directive, injected \u003cform\u003e elements can exfiltrate credentials to an external origin. This vulnerability is fixed in 6.5.","severity":{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00195,"percentile":0.09205,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-79"],"published":"2026-04-06T14:48:05Z","modified":"2026-10-28T02:30:38Z","products":[{"vendor":"com.ritense.valtimo","product":"web"},{"vendor":"pi-hole","product":"web"},{"vendor":"pi-hole","product":"web_interface"}],"references":[{"url":"https://github.com/pi-hole/web/security/advisories/GHSA-7xqw-r9pr-qv59","tags":["x_refsource_CONFIRM","exploit","Vendor Advisory","advisory"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33403.json","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-33403","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2026-33403","title":"Pi-hole has a Reflected XSS / HTML injection in taillog.js","description":"Pi-hole Admin Interface is a web interface for managing Pi-hole, a network-level ad and internet tracker blocking application. From 6.0 to before 6.5, a reflected DOM-based XSS vulnerability in taillog.js allows an unauthenticated attacker to inject arbitrary HTML into the Pi-hole admin interface by crafting a malicious URL. The file query parameter is interpolated into an innerHTML assignment without escaping. Because the Content-Security-Policy is missing the form-action directive, injected \u003cform\u003e elements can exfiltrate credentials to an external origin. This vulnerability is fixed in 6.5.","status":"published","published":"2026-04-06T14:48:05.132Z","modified":"2026-04-06T15:05:23.49Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:20:07.609948Z"}],"euvd":[{"id":"EUVD-2026-19279","description":"Pi-hole Admin Interface is a web interface for managing Pi-hole, a network-level ad and internet tracker blocking application. From 6.0 to before 6.5, a reflected DOM-based XSS vulnerability in taillog.js allows an unauthenticated attacker to inject arbitrary HTML into the Pi-hole admin interface by crafting a malicious URL. The file query parameter is interpolated into an innerHTML assignment without escaping. Because the Content-Security-Policy is missing the form-action directive, injected \u003cform\u003e elements can exfiltrate credentials to an external origin. This vulnerability is fixed in 6.5.","status":"published","published":"2026-04-06T14:48:05Z","modified":"2026-04-06T15:05:23Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T19:25:16.17729Z"}],"nvd":[{"id":"CVE-2026-33403","description":"Pi-hole Admin Interface is a web interface for managing Pi-hole, a network-level ad and internet tracker blocking application. From 6.0 to before 6.5, a reflected DOM-based XSS vulnerability in taillog.js allows an unauthenticated attacker to inject arbitrary HTML into the Pi-hole admin interface by crafting a malicious URL. The file query parameter is interpolated into an innerHTML assignment without escaping. Because the Content-Security-Policy is missing the form-action directive, injected \u003cform\u003e elements can exfiltrate credentials to an external origin. This vulnerability is fixed in 6.5.","status":"published","published":"2026-04-06T15:17:10.303Z","modified":"2026-10-26T22:10:00.163Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"secondary"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:12:13.1424Z"}],"osv":[{"id":"CVE-2026-33403","title":"Pi-hole has a Reflected XSS / HTML injection in taillog.js","description":"Pi-hole Admin Interface is a web interface for managing Pi-hole, a network-level ad and internet tracker blocking application. From 6.0 to before 6.5, a reflected DOM-based XSS vulnerability in taillog.js allows an unauthenticated attacker to inject arbitrary HTML into the Pi-hole admin interface by crafting a malicious URL. The file query parameter is interpolated into an innerHTML assignment without escaping. Because the Content-Security-Policy is missing the form-action directive, injected \u003cform\u003e elements can exfiltrate credentials to an external origin. This vulnerability is fixed in 6.5.","status":"published","published":"2026-04-06T14:48:05.132Z","modified":"2026-10-28T02:30:38.223599769Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T15:45:01.896044Z"}]}}