CVE-2021-34582 Phoenix Contact: FL MGUARD XSS through web-based management and REST API
High-privilege users can inject HTML via manipulated certificates in Phoenix Contact FL MGUARD firewalls, enabling cross-site scripting attacks.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2021-34582?
CVE-2021-34582 is a medium-severity cross-site scripting vulnerability in PHOENIX CONTACT FL MGUARD, published on 10 Nov 2021. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
Official description
In Phoenix Contact FL MGUARD 1102 and 1105 in Versions 1.4.0, 1.4.1 and 1.5.0 a user with high privileges can inject HTML code (XSS) through web-based management or the REST API with a manipulated certificate file.
Weakness: CWE-79
Which versions are affected by CVE-2021-34582?
It affects 2 products.
Products include Phoenixcontact Fl Mguard 1102 Firmware, Phoenixcontact Fl Mguard 1105 Firmware.
How do I fix CVE-2021-34582?
No fix has been published for CVE-2021-34582 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-2021-34582 being exploited?
There is no known exploitation of CVE-2021-34582 in the wild and no public exploit code.
Other vulnerabilities in PHOENIX CONTACT FL MGUARD
Sources
Also known as GHSA-g738-v6qm-gpqv.