Vulnerability in SUSE Rancher

CVE-2019-11881

A vulnerability exists in Rancher before 2.2.4 in the login component, where the errorMsg parameter can be tampered to display arbitrary content, filtering tags but not special characters or symbols. There's no other limitation of the message, allowing malicious users to lure legitimate users to visit phishing sites with scare tactics, e.g., displaying a "This version of Rancher is outdated, please visit https://malicious.rancher.site/upgrading" message.

EPSS: 0.023 (81.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.7 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N.

Affected products

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2019-11881?
CVE-2019-11881 is a medium-severity vulnerability in SUSE Rancher. CVSS score: 4.7/10. Published 2019-06-10.
How severe is CVE-2019-11881?
Medium severity. CVSS v3 base score is 4.7 out of 10.
Is CVE-2019-11881 known to be exploited?
7 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.