Vulnerability · Published Mar 5, 2026 · Assigned by GitHub_M
CVE-2026-28413Products.isurlinportal: Possible open redirect when using more than 2 forward slashes
Medium 5.3
In plain English
A medium-severity open redirect in Products.isurlinportal from plone. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 17% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)5.3Medium
Exploit odds (30 days)0.3%top 82.5% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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 packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| PyPI | products-isurlinportal | 4.0.0 | GHSA-43gx-6gv6-3jcp |
| PyPI | products-isurlinportal | 3.1.0 | GHSA-43gx-6gv6-3jcp |
| PyPI | products-isurlinportal | 2.1.0 | GHSA-43gx-6gv6-3jcp |
| PyPI | products-isurlinportal | 2.1.0 | GHSA-43gx-6gv6-3jcp |
| PyPI | products-isurlinportal | 3.1.0 | GHSA-43gx-6gv6-3jcp |
| PyPI | products-isurlinportal | 2.1.0, 3.1.0 | PYSEC-2026-112 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| plone | Products.isurlinportal | < 4.0.0< 3.1.0< 2.1.0 |
Weakness: CWE-601 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N