CVE-2021-34582

Phoenix Contact: FL MGUARD XSS through web-based management and REST API

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.

Remediation

Solution:

  • PHOENIX CONTACT recomments to upgrade to firmware version 1.5.1 (or any later version).

Workaround:

  • If an untrusted user may have exploited the vulnerability, it is recommended to revoke access for that user, and to re-upload the certificates on the Basic settings > LDAP and Logs > Remote logging pages through the REST API (i.e., without viewing these pages in the web-based management).

Category

4.8
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.09%
Third-Party Advisory vde.com
Affected: PHOENIX CONTACT FL MGUARD
Published at:
Updated at:

References

Link Tags
https://cert.vde.com/en/advisories/VDE-2021-046/ third party advisory

Frequently Asked Questions

What is the severity of CVE-2021-34582?
CVE-2021-34582 has been scored as a medium severity vulnerability.
How to fix CVE-2021-34582?
To fix CVE-2021-34582: PHOENIX CONTACT recomments to upgrade to firmware version 1.5.1 (or any later version).
Is CVE-2021-34582 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-34582 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-34582?
CVE-2021-34582 affects PHOENIX CONTACT FL MGUARD.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.