CVE-2021-41125HTTP authentication credential leak to target websites in scrapy
- 5.7MediumCVSS base score
- 1.3%Exploitation in 30 daysEPSS · top 30% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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`.
Timeline
ID reserved
By GitHub_M
- 21 days later
· 21 days later
Published
- 3 years later
· 3 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| GitHub_MCNA (assigner) | 3.1 | Medium5.7 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N |
| NVDNVD · Modified | 3.1 | Medium6.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N |
- EPSS (exploitation in 30 days)
- 1.3% · top 30% of all CVEs (13 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.7.
Affected products
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- PyPIScrapyGHSA-jwqp-28gf-p498 (opens in a new tab)
References
References5
- https://github.com/scrapy/scrapy/security/advisories/GHSA-jwqp-28gf-p498 (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://github.com/scrapy/scrapy/commit/b01d69a1bf48060daec8f751368622352d8b85a6 (opens in a new tab)x_refsource_MISCx_transferred
- https://w3lib.readthedocs.io/en/latest/w3lib.html#w3lib.http.basic_auth_header (opens in a new tab)x_refsource_MISCx_transferred
- http://doc.scrapy.org/en/latest/topics/downloader-middleware.html#module-scrapy.downloadermiddlewares.httpauth (opens in a new tab)x_refsource_MISCx_transferred
- [debian-lts-announce] 20220316 [SECURITY] [DLA 2950-1] python-scrapy security update (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2021-0239 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-jwqp-28gf-p498 (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2021-41125)Record last updated .