CVE-2020-9995 Cross-site scripting in macOS
Attackers can exploit URL parsing flaws in macOS Server to execute cross-site scripting or redirect users to malicious sites.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2020-9995?
CVE-2020-9995 is a medium-severity cross-site scripting vulnerability in Apple macOS, published on 2 Apr 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
An issue existed in the parsing of URLs. This issue was addressed with improved input validation. This issue is fixed in macOS Server 5.11. Processing a maliciously crafted URL may lead to an open redirect or cross site scripting.
Which versions are affected by CVE-2020-9995?
It affects 1 product.
Products include Apple Macos Server.
How do I fix CVE-2020-9995?
No fix has been published for CVE-2020-9995 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2020-9995 being exploited?
There is no known exploitation of CVE-2020-9995 in the wild and no public exploit code.
Sources
Also known as GHSA-wfmp-hg8c-4ph3.