gtbn.py in Plone before 4.2.3 and 4.3 before beta 1 allows remote authenticated users with certain permissions to bypass the Python sandbox and execute arbitrary Python code via unspecified vectors.

References

• https://nvd.nist.gov/vuln/detail/CVE-2012-5493
• https://github.com/plone/Products.CMFPlone/blob/4.2.3/docs/CHANGES.txt
• https://plone.org/products/plone-hotfix/releases/20121106
• https://plone.org/products/plone/security/advisories/20121106/09
• http://www.openwall.com/lists/oss-security/2012/11/10/1