CVE-2026-57149 Plone plone.app.portlets.portlets - Server-Side Template Injection

Plone plone.app.portlets.portlets 5.0.0 to <5.0.8, <6.0.4, and <7.0.2 contains a code execution vulnerability caused by unsafe evaluation of user-supplied TALES expressions in the Classic portlet template, letting authenticated users execute arbitrary code, exploit requires ability to add or edit Classic portlets.

CVSS base score 9.9 /10
Critical
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.64% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Server-Side Template Injection
Impact
Remote Code Execution, Privilege Escalation
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Published
22 September 2026
Updated
15 October 2026
Weakness
CWE-95

Vendor fix

Update to plone.app.portlets versions 5.0.8, 6.0.4, or 7.0.2 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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