What’s Vulnerable › Vulnerabilities
CVE-2026-28413: Products.isurlinportal: Possible open redirect when using more than 2 forward slashes
- Severity: medium (CVSS 6.1 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.2% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-03-05 · updated 2026-06-17
- Weakness: CWE-601
Description
Products.isurlinportal is a replacement for isURLInPortal method in Plone. Prior to versions 2.1.0, 3.1.0, and 4.0.0, a url /login?came_from=////evil.example may redirect to an external website after login. This issue has been patched in versions 2.1.0, 3.1.0, and 4.0.0.
Affected products
- plone Products.isurlinportal: before 2.1.0; from 3.0.0 before 3.1.0; 4.0.0-alpha1 — fixed in 2.1.0, 3.1.0
How to fix
Upgrade to a fixed version: plone Products.isurlinportal 2.1.0, 3.1.0. Check the vendor advisory for mitigations.
References
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