CVE-2021-21330
low-risk
Published 2021-02-26
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.
Do I need to act?
-
0.49% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
3
CVSS 3.1/10
Low
NETWORK
/ HIGH complexity
Affected Products (4)
Affected Vendors
References (16)
Third Party Advisory
https://github.com/aio-libs/aiohttp/blob/master/CHANGES.rst#374-2021-02-25
Third Party Advisory
https://github.com/aio-libs/aiohttp/security/advisories/GHSA-v6wp-4m6f-gcjg
Third Party Advisory
https://security.gentoo.org/glsa/202208-19
Third Party Advisory
https://www.debian.org/security/2021/dsa-4864
Third Party Advisory
https://github.com/aio-libs/aiohttp/blob/master/CHANGES.rst#374-2021-02-25
Third Party Advisory
https://github.com/aio-libs/aiohttp/security/advisories/GHSA-v6wp-4m6f-gcjg
Third Party Advisory
https://security.gentoo.org/glsa/202208-19
Third Party Advisory
https://www.debian.org/security/2021/dsa-4864
23
/ 100
low-risk
Severity
11/34 · Low
Exploitability
2/34 · Minimal
Exposure
10/34 · Low