CVE-2021-33425 Cross-site scripting in n/a
Attackers can inject arbitrary JavaScript via the hostname field in OpenWRT LuCI, potentially executing code in the admin interface.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2021-33425?
CVE-2021-33425 is a medium-severity cross-site scripting vulnerability in Openwrt Openwrt, published on 25 May 2021. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
A stored cross-site scripting (XSS) vulnerability was discovered in the Web Interface for OpenWRT LuCI version 19.07 which allows attackers to inject arbitrary Javascript in the OpenWRT Hostname via the Hostname Change operation.
Weakness: CWE-79
Which versions are affected by CVE-2021-33425?
It affects 1 product.
Products include Openwrt Openwrt.
How do I fix CVE-2021-33425?
No fix has been published for CVE-2021-33425 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-2021-33425 being exploited?
There is no known exploitation of CVE-2021-33425 in the wild and no public exploit code.
Other vulnerabilities in Openwrt Openwrt
- CVE-2020-28951 Use after free in n/a
- CVE-2026-62948 Cross-site scripting in openwrt
- CVE-2026-30871 OpenWrt Project has Stack-based Buffer Overflow in DNS PTR Query
- CVE-2026-30872 OpenWrt Project has a Stack-based Buffer Overflow vulnerability via IPv6 reverse DNS lookup
- CVE-2021-28961 Command injection in n/a
Sources
Also known as GHSA-c35r-9rpc-98gc.