{"id":"GHSA-84pr-m4jr-85g5","summary":"flask-cors vulnerable to log injection when the log level is set to debug","details":"corydolphin/flask-cors is vulnerable to log injection when the log level is set to debug. An attacker can inject fake log entries into the log file by sending a specially crafted GET request containing a CRLF sequence in the request path. This vulnerability allows attackers to corrupt log files, potentially covering tracks of other attacks, confusing log post-processing tools, and forging log entries. The issue is due to improper output neutralization for logs.","aliases":["CVE-2024-1681","PYSEC-2024-271"],"modified":"2026-09-10T03:50:12.410188532Z","published":"2024-04-19T21:31:08Z","database_specific":{"severity":"MODERATE","github_reviewed":true,"github_reviewed_at":"2024-04-22T14:08:38Z","nvd_published_at":"2024-04-19T20:15:09Z","cwe_ids":["CWE-117"]},"references":[{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-1681"},{"type":"PACKAGE","url":"https://github.com/corydolphin/flask-cors"},{"type":"WEB","url":"https://github.com/corydolphin/flask-cors/blob/40acc8092332dfed4bb54d7a4f89a6d479466de7/flask_cors/extension.py#L194"},{"type":"WEB","url":"https://github.com/pypa/advisory-database/tree/main/vulns/flask-cors/PYSEC-2024-271.yaml"},{"type":"WEB","url":"https://huntr.com/bounties/25a7a0ba-9fa2-4777-acb6-03e5539bb644"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2025/05/msg00049.html"}],"affected":[{"package":{"name":"flask-cors","ecosystem":"PyPI","purl":"pkg:pypi/flask-cors"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.0.1"}]}],"versions":["0.0.0.dev3","0.0.0.dev4","1.0","1.1","1.1.1","1.1.2","1.1.3","1.10.0","1.10.1","1.10.2","1.10.3","1.2.0","1.2.1","1.3.0","1.3.1","1.4.0","1.5.0","1.6.0","1.6.1","1.7.0","1.7.1","1.7.2","1.7.3","1.7.4","1.8.0","1.8.1","1.9.0","2.0.0","2.0.0rc1","2.0.1","2.1.0","2.1.1","2.1.2","2.1.3","3.0.0","3.0.1","3.0.10","3.0.2","3.0.3","3.0.4","3.0.6","3.0.7","3.0.8","3.0.9","4.0.0","4.0.0a0"],"database_specific":{"last_known_affected_version_range":"\u003c= 4.0.0","source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2024/04/GHSA-84pr-m4jr-85g5/GHSA-84pr-m4jr-85g5.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N"}]}