CVE-2021-20857 Cross-site scripting in ELECOM LAN router
Remote authenticated attackers can inject arbitrary scripts into the ELECOM LAN router interface, potentially compromising user sessions.
- 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-2021-20857?
CVE-2021-20857 is a medium-severity cross-site scripting vulnerability in ELECOM LAN router, published on 1 Dec 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
Cross-site scripting vulnerability in ELECOM LAN router WRC-2533GHBK-I firmware v1.20 and prior allows a remote authenticated attacker to inject an arbitrary script via unspecified vectors.
Weakness: CWE-79
Which versions are affected by CVE-2021-20857?
It affects 1 product.
Products include Elecom Wrc-2533ghbk-I Firmware.
How do I fix CVE-2021-20857?
No fix has been published for CVE-2021-20857 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-2021-20857 being exploited?
There is no known exploitation of CVE-2021-20857 in the wild and no public exploit code.
Other vulnerabilities in ELECOM LAN router
Sources
Also known as GHSA-54wf-xwvm-j98j.