CVE-2021-33926: Plone

High severity, CVSS 8.8. EPSS: 1% chance of exploitation in the next 30 days.

An issue in Plone CMS v. 5.2.4, 5.2.3, 5.2.2, 5.2.1, 5.2.0, 5.1rc2, 5.1rc1, 5.1b4, 5.1b3, 5.1b2, 5.1a2, 5.1a1, 5.1.7, 5.1.6, 5.1.5, 5.1.4, 5.1.2, 5.1.1 5.1, 5.0rc3, 5.0rc2, 5.0rc1, 5.0.9, 5.0.8, 5.0.7, 5.0.6, 5.0.5, 5.0.4, 5.0.3, 5.0.2, 5.0.10, 5.0.1, 5.0, 4.3.9, 4.3.8, 4.3.7, 4.3.6, 4.3.5, 4.3.4, 4.3.3, 4.3.20, 4 allows attacker to access sensitive information via the RSS feed protlet.

Affected products

• Plone Plone: version 4.3 only; version 4.3.1 only; version 4.3.2 only; version 4.3.3 only; version 4.3.4 only; version 4.3.5 only; …

Published 2023-02-17. Last modified 2026-06-17.