What’s Vulnerable › Vulnerabilities

CVE-2019-11881

• Severity: medium (CVSS 4.7 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.0% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2019-06-10 · updated 2026-06-17

Description

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to lure legitimate users to visit phishing sites with scare tactics, e.g., displaying a "This version of Rancher is outdated, please visit https://malicious.rancher.site/upgrading" message.

Affected products

• SUSE Rancher: 2.1.4

References

• https://github.com/MauroEldritch/VanCleef
• https://github.com/rancher/rancher/blob/v2.2.4/pkg/auth/providers/saml/saml_client.go#L282
• https://github.com/rancher/rancher/commit/e59adbc7565251919d84d6e353421104be8da06e
• https://github.com/rancher/rancher/issues/20216
• https://github.com/MauroEldritch/VanCleef
• https://github.com/rancher/rancher/issues/20216

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