CVE-2026-28413 PUBLISHED

Products.isurlinportal: Possible open redirect when using more than 2 forward slashes

Assigner: GitHub_M
Reserved: 27.02.2026 Published: 05.03.2026 Updated: 06.03.2026

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.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
CVSS Score: 5.3

Attack Vector	Network	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	Low
Privileges Required	None	Integrity Impact	None
User Interaction	None	Availability Impact	None

CVSS 3.1

Product Status

Vendor	plone
Product	Products.isurlinportal
Versions	Version < 4.0.0 is affected Version < 3.1.0 is affected Version < 2.1.0 is affected

References

https://github.com/plone/Products.isurlinportal/security/advisories/GHSA-43gx-6gv6-3jcp

Problem Types

CWE-601: URL Redirection to Untrusted Site ('Open Redirect') CWE