Information disclosure in Scrapy
CVE-2021-41125
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`.
Vulnerability class: Information Disclosure
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.7 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.013 (68.5th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 68th percentile — 68.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.013 · newest: 0.013 · change: +0.000
Affected products
- Scrapy — versions < 1.8.1, >= 2.0.0, < 2.5.1
- Debian Linux — versions 9.0
Weakness classification (CWE)
References
- github.com/scrapy/scrapy/security/advisories/GHSA-jwqp-28gf-p498 (Third Party Advisory)
- github.com/scrapy/scrapy/commit/b01d69a1bf48060daec8f751368622352d8b85a6 (Patch, Third Party Advisory)
- w3lib.readthedocs.io/en/latest/w3lib.html (Third Party Advisory)
- doc.scrapy.org/en/latest/topics/downloader-middleware.html (Vendor Advisory)
- lists.debian.org/debian-lts-announce/2022/03/msg00021.html (mailing-list, Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-41125?
- CVE-2021-41125 is a medium-severity vulnerability in Scrapy, classified under Information Disclosure. CVSS score: 5.7/10. Published 2021-10-06.
- How severe is CVE-2021-41125?
- Medium severity. CVSS v3 base score is 5.7 out of 10.