CVE-2021-20994 WAGO: Managed Switches: Reflected Cross-site Scripting
An attacker can inject malicious code into the web management interface of WAGO managed switches by tricking users into clicking a link.
- 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-2021-20994?
CVE-2021-20994 is a high-severity cross-site scripting vulnerability in WAGO 0852-0303, published on 13 May 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
In multiple managed switches by WAGO in different versions an attacker may trick a legitimate user to click a link to inject possible malicious code into the Web-Based Management.
Weakness: CWE-79
Which versions are affected by CVE-2021-20994?
It affects 5 products.
Products include Wago 0852-0303 Firmware, Wago 0852-1305\/000-001 Firmware, Wago 0852-1305 Firmware, Wago 0852-1505\/000-001 Firmware, Wago 0852-1505 Firmware.
How do I fix CVE-2021-20994?
No fix has been published for CVE-2021-20994 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-2021-20994 being exploited?
There is no known exploitation of CVE-2021-20994 in the wild and no public exploit code.
Other vulnerabilities in WAGO 0852-0303
- CVE-2021-20998 WAGO: Managed Switches: Unauthorized creation of user accounts
- CVE-2021-20997 WAGO: Managed Switches: Unauthorized access to password hashes
- CVE-2021-20993 WAGO: Managed Switches: Exposure of sensitive information through directory listing
- CVE-2021-20995 WAGO: Managed Switches: Storage of user credentials in a cookie
- CVE-2021-20996 WAGO: Managed Switches: Unsecure Cookie settings
Sources
Also known as GHSA-pvcx-jpfw-6gm6.