CVE-2021-21330
3.1 · LOWOverview
CVE-2021-21330 is a low-severity vulnerability affecting aiohttp aiohttp. It was published on February 26, 2021 and has a CVSS 3.1 base score of 3.1 (LOW).
This vulnerability has a CVSS 3.1 base score of 3.1, rated LOW. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical Description
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.
Remediation
Check the references section for vendor advisories and patches from aiohttp. Update aiohttp to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| aiohttp | aiohttp | >= 0, < 3.7.4 | Affected |
References
Frequently Asked Questions
What is CVE-2021-21330?
CVE-2021-21330 is a low-severity vulnerability affecting aiohttp aiohttp. It was published on February 26, 2021 and has a CVSS 3.1 base score of 3.1 (LOW).
How severe is CVE-2021-21330?
This vulnerability has a CVSS 3.1 base score of 3.1, rated LOW. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2021-21330?
Check the references section for vendor advisories and patches from aiohttp. Update aiohttp to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2021-21330?
CyberStrike's AI-powered security agents can automatically detect CVE-2021-21330 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
Automated penetration testing that runs continuously, not just quarterly.
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