CVE-2021-41124High· 7.4▾ TwilightSplash authentication credentials potentially leaked to target websites
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 40.7 · likelihood 0.2 · exploitation 0
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Exploit-prediction probability, daily snapshots since Jul 8.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via OSV
Last analysed / modified upstream
1.1%
1.1% → 1.1%
If you use HttpAuthMiddleware (i.e. the http_user and http_pass spider attributes) for Splash authentication, any non-Splash request will expose your credentials to the request target. This includes robots.txt requests sent by Scrapy when the ROBOTSTXT_OBEY setting is set to True.
Upgrade to scrapy-splash 0.8.0 and use the new SPLASH_USER and SPLASH_PASS settings instead to set your Splash authentication credentials safely.
If you cannot upgrade, set your Splash request credentials on a per-request basis, using the splash_headers request parameter, instead of defining them globally using the HttpAuthMiddleware.
Alternatively, make sure all your requests go through Splash. That includes disabling the robots.txt middleware.
If you have any questions or comments about this advisory:
scrapy-splash < 0.8.0Upgrade to a patched release:
scrapy-splash 0.8.0