CVE-2011-1949 Plone Cross-site Scripting vulnerability

Low 3.5 Published Updated

Authenticated users can inject arbitrary scripts via the safe_html filter in Plone, potentially leading to session hijacking or code execution.

Exploited in the wild
Not known
Login needed
Any signed-in user
Attackable
Over the internet
Victim action needed
A user has to click or open something
Fix
Available

What is CVE-2011-1949?

CVE-2011-1949 is a low-severity cross-site scripting vulnerability in Plone Plone, published on 6 Jun 2011. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

Official description

Cross-site scripting (XSS) vulnerability in the safe_html filter in Products.PortalTransforms in Plone 2.1 through 4.1 allows remote authenticated users to inject arbitrary web script or HTML via unspecified vectors, a different vulnerability than CVE-2010-2422.

Weakness: CWE-79

Which versions are affected by CVE-2011-1949?

7 open source packages ship an affected version, including plone and Plone. It affects 1 product.

PackageAffectedFixed in
plone PyPIAll versions4.1.1
plone PyPIFrom 3.3.23.3.6
plone PyPIFrom 4.0a04.0.6
plone PyPIFrom 4.1a04.1.1
Plone PyPIFrom 3.3.23.3.6
Plone PyPIFrom 4.0a04.0.6
1 more packages
Plone PyPIFrom 4.1a04.1.1

Products include Plone Plone.

How do I fix CVE-2011-1949?

Upgrade plone to a fixed version for your release line: 4.1.1, 3.3.6 or 4.0.6.

Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.

Is CVE-2011-1949 being exploited?

There is no known exploitation of CVE-2011-1949 in the wild and no public exploit code.

All Plone Plone vulnerabilities

Sources

Also known as GHSA-h6hq-c896-w882, PYSEC-2011-15.

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