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CVE-2021-21330 PUBLISHED

aiohttp is an asynchronous HTTP client/server framework for asyncio and Python. In aiohttp before version 3.7.4 there is an open redirect vulnerability. A maliciously crafted link to an aiohttp-based web-server could redirect the browser to a different website. It is caused by a bug in the `aiohttp.web_middlewares.normalize_path_middleware` middleware. This security problem has been fixed in 3.7.4. Upgrade your dependency using pip as follows "pip install aiohttp >= 3.7.4". If upgrading is not an option for you, a workaround can be to avoid using `aiohttp.web_middlewares.normalize_path_middleware` in your applications.

EPSS 0.49% · 65.5th percentile

Risk Scores

EPSS Score
0.49%
65.5th percentile

Affected Products

VendorProductVersions
Ubuntu:Pro:18.04:LTSpython-aiohttp0, 2.2.3-1build1, 2.2.3-2
Ubuntu:Pro:20.04:LTSpython-aiohttp3.5.4-1, 3.5.4-1build1, 3.6.2-1build1

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