GHSA-84pr-m4jr-85g5
flask-cors vulnerable to log injection when the log level is set to debug
Packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| PyPI | flask-cors | < 4.0.1 | 4.0.1 |
Details
As written in the advisory (Markdown source, shown as plain text).
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.
References
External links from the advisory. They lead to third-party sites.
- https://nvd.nist.gov/vuln/detail/CVE-2024-1681
- https://github.com/corydolphin/flask-cors
- https://github.com/corydolphin/flask-cors/blob/40acc8092332dfed4bb54d7a4f89a6d479466de7/flask_cors/extension.py#L194
- https://github.com/pypa/advisory-database/tree/main/vulns/flask-cors/PYSEC-2024-271.yaml
- https://huntr.com/bounties/25a7a0ba-9fa2-4777-acb6-03e5539bb644
- https://lists.debian.org/debian-lts-announce/2025/05/msg00049.html