{"cve":"CVE-2021-41125","nvd":{"published":"2021-10-06T18:15:10.953","modified":"2026-06-17T04:07:55.323","status":"Modified","description":"Scrapy is a high-level web crawling and scraping framework for Python. If you use `HttpAuthMiddleware` (i.e. the `http_user` and `http_pass` spider attributes) for HTTP authentication, all requests will expose your credentials to the request target. This includes requests generated by Scrapy components, such as `robots.txt` requests sent by Scrapy when the `ROBOTSTXT_OBEY` setting is set to `True`, or as requests reached through redirects. Upgrade to Scrapy 2.5.1 and use the new `http_auth_domain` spider attribute to control which domains are allowed to receive the configured HTTP authentication credentials. If you are using Scrapy 1.8 or a lower version, and upgrading to Scrapy 2.5.1 is not an option, you may upgrade to Scrapy 1.8.1 instead. If you cannot upgrade, set your HTTP authentication credentials on a per-request basis, using for example the `w3lib.http.basic_auth_header` function to convert your credentials into a value that you can assign to the `Authorization` header of your request, instead of defining your credentials globally using `HttpAuthMiddleware`.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","score":6.5},"cwes":["CWE-522","CWE-200"],"references":["http://doc.scrapy.org/en/latest/topics/downloader-middleware.html#module-scrapy.downloadermiddlewares.httpauth","https://github.com/scrapy/scrapy/commit/b01d69a1bf48060daec8f751368622352d8b85a6","https://github.com/scrapy/scrapy/security/advisories/GHSA-jwqp-28gf-p498","https://lists.debian.org/debian-lts-announce/2022/03/msg00021.html","https://w3lib.readthedocs.io/en/latest/w3lib.html#w3lib.http.basic_auth_header"],"products":["debian:debian_linux","scrapy:scrapy"],"source":"nvd","synced_at":"2026-10-19T21:23:41.316049955+00:00"},"epss":{"cve":"CVE-2021-41125","score":0.01261,"percentile":0.69643,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-jwqp-28gf-p498","url":"https://osv.dev/vulnerability/GHSA-jwqp-28gf-p498","summary":"Scrapy HTTP authentication credentials potentially leaked to target websites ","modified":"2026-07-08T06:29:55.026270559Z","packages":[{"ecosystem":"PyPI","name":"scrapy","purl":"pkg:pypi/scrapy","ranges":["<1.8.1"],"fixed":["1.8.1"]},{"ecosystem":"PyPI","name":"scrapy","purl":"pkg:pypi/scrapy","ranges":[">=2.0.0 <2.5.1"],"fixed":["2.5.1"]}]},{"id":"PYSEC-2021-363","url":"https://osv.dev/vulnerability/PYSEC-2021-363","summary":"","modified":"2023-11-08T04:06:52.040115Z","packages":[{"ecosystem":"PyPI","name":"scrapy","purl":"pkg:pypi/scrapy","ranges":["<1.8.1",">=2.0.0 <2.5.1"],"fixed":["1.8.1","2.5.1"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}