{"items":[{"id":"NVI-00016167","kind":"vulnerability","title":"Tornado vulnerable to Header Injection and XSS via reason argument","revision":2,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected.","NVD lastModified does not establish freshness of every associated CPE record."],"lifecycle":"active","identifiers":["GHSA-pr2v-jx2c-wg9f","CVE-2025-67724"],"plain_summary":"GitHub lists this reviewed advisory for tornado. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-0e6b821f1f80547f9e8a71df04859b80"],"action_type":"investigate","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[{"kind":"CVSS","as_of":"2026-07-20T18:55:12.000Z","value":"5.4 medium","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-378641bf34c4e2c0d7a8c3443cd57c9e"},{"kind":"CVSS","as_of":"2026-10-07T20:10:01.970Z","value":"5.4 MEDIUM (3.1)","meaning":"security-advisories@github.com severity; no combined Null risk score.","source_id":"sr-0e6b821f1f80547f9e8a71df04859b80"},{"kind":"CVSS","as_of":"2026-10-07T20:10:01.970Z","value":"6.1 MEDIUM (3.1)","meaning":"nvd@nist.gov severity; no combined Null risk score.","source_id":"sr-0e6b821f1f80547f9e8a71df04859b80"}],"why_it_matters":"Published affected context helps an owner decide what evidence to gather. This report has not examined your application.","related_sources":[{"id":"sr-378641bf34c4e2c0d7a8c3443cd57c9e","url":"https://github.com/advisories/GHSA-pr2v-jx2c-wg9f","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-pr2v-jx2c-wg9f","publisher":"GitHub Advisory Database","observed_at":"2026-11-04T02:49:06.528Z"},{"id":"sr-0e6b821f1f80547f9e8a71df04859b80","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-67724","basis":"official_catalog","notes":"This product uses data from the NVD API but is not endorsed or certified by the NVD.","title":"CVE-2025-67724","publisher":"NIST National Vulnerability Database","observed_at":"2026-11-06T15:14:24.735Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-378641bf34c4e2c0d7a8c3443cd57c9e"],"technology":"tornado","known_exclusions":[],"conditions_summary":"# Header injection and XSS via `reason` argument\n\n## Summary\n\nThe `reason` argument (used by both `RequestHandler.set_status` and `tornado.web.HTTPError` is designed to allow applications to pass custom \"reason\" phrases (the \"Not Found\" in `HTTP/1.1 404 Not Found`) to the HTTP status line (mainly for non-standard status codes). Vulnerabilities exist in Tornado versions prior to 6.5.3 if untrusted data is passed as the `reason` argument.\n\n## Details\n\nIn vulnerable versions, the supplied `reason` phrase is used unescaped in HTTP headers (where it could be used for header injection) or in HTML in the default error page (where it could be used for XSS).\n\n## Impact\n\n* **Type:** Reflected Cross-Site Scripting (CWE-79) in default error page, or header injection (CWE-644)\n* **Actors:** Remote attacker who can cause the application to raise `HTTPError`/`set_status` with an attacker-controlled `reason` (e.g., via query parameter used by developer).\n* **Effect:** Execution of arbitrary JavaScript in victims' browsers when they view the error page — possible session token theft, CSRF escalation, UI spoofing, or other client-side attacks depending on context.\n* **Scope:** Only applications that","public_affected_ranges":["< 6.5.3"]}],"null_published_at":"2026-11-07T18:43:12.064Z","source_updated_at":"2026-07-20T18:55:12.000Z","source_disclosed_at":"2026-07-20T18:55:11.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"Source facts changed; compare the preserved prior revision.","null_first_observed_at":"2026-11-04T02:49:06.528Z"},{"id":"NVI-00016167","kind":"vulnerability","title":"Tornado vulnerable to Header Injection and XSS via reason argument","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-pr2v-jx2c-wg9f","CVE-2025-67724"],"plain_summary":"GitHub lists this reviewed advisory for tornado. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-378641bf34c4e2c0d7a8c3443cd57c9e"],"action_type":"investigate","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[{"kind":"CVSS","as_of":"2026-07-20T18:55:12.000Z","value":"5.4 medium","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-378641bf34c4e2c0d7a8c3443cd57c9e"}],"why_it_matters":"Published affected context helps an owner decide what evidence to gather. This report has not examined your application.","related_sources":[{"id":"sr-378641bf34c4e2c0d7a8c3443cd57c9e","url":"https://github.com/advisories/GHSA-pr2v-jx2c-wg9f","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-pr2v-jx2c-wg9f","publisher":"GitHub Advisory Database","observed_at":"2026-11-04T02:49:06.528Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-378641bf34c4e2c0d7a8c3443cd57c9e"],"technology":"tornado","known_exclusions":[],"conditions_summary":"# Header injection and XSS via `reason` argument\n\n## Summary\n\nThe `reason` argument (used by both `RequestHandler.set_status` and `tornado.web.HTTPError` is designed to allow applications to pass custom \"reason\" phrases (the \"Not Found\" in `HTTP/1.1 404 Not Found`) to the HTTP status line (mainly for non-standard status codes). Vulnerabilities exist in Tornado versions prior to 6.5.3 if untrusted data is passed as the `reason` argument.\n\n## Details\n\nIn vulnerable versions, the supplied `reason` phrase is used unescaped in HTTP headers (where it could be used for header injection) or in HTML in the default error page (where it could be used for XSS).\n\n## Impact\n\n* **Type:** Reflected Cross-Site Scripting (CWE-79) in default error page, or header injection (CWE-644)\n* **Actors:** Remote attacker who can cause the application to raise `HTTPError`/`set_status` with an attacker-controlled `reason` (e.g., via query parameter used by developer).\n* **Effect:** Execution of arbitrary JavaScript in victims' browsers when they view the error page — possible session token theft, CSRF escalation, UI spoofing, or other client-side attacks depending on context.\n* **Scope:** Only applications that","public_affected_ranges":["< 6.5.3"]}],"null_published_at":"2026-11-04T10:04:27.901Z","source_updated_at":"2026-07-20T18:55:12.000Z","source_disclosed_at":"2026-07-20T18:55:11.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"First indexed by Null; source disclosure date is shown separately.","null_first_observed_at":"2026-11-04T02:49:06.528Z"}],"next_cursor":null,"snapshot_revision":"42594"}