CVE-2011-0720 in Plone
Summary
by MITRE
Unspecified vulnerability in Plone 2.5 through 4.0, as used in Conga, luci, and possibly other products, allows remote attackers to obtain administrative access, read or create arbitrary content, and change the site skin via unknown vectors.
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Analysis
by VulDB Data Team • 01/18/2025
The vulnerability described in CVE-2011-0720 represents a critical authorization flaw affecting Plone content management systems across versions 2.5 through 4.0. This issue manifests as an unspecified weakness that enables remote attackers to escalate privileges and gain administrative control over affected systems. The vulnerability's impact extends beyond simple access control bypass to encompass full administrative capabilities including content creation, modification, and the ability to alter site skins, which can fundamentally change the user interface and potentially expose sensitive functionality. The affected products include not only Plone itself but also Conga and luci platforms, indicating a widespread vulnerability within the ecosystem. This type of vulnerability directly violates the principle of least privilege and represents a severe breakdown in the security model of these content management platforms.
The technical nature of this vulnerability appears to stem from inadequate input validation or improper access control mechanisms within the authentication and authorization subsystems of these Plone versions. The unspecified vectors suggest that the flaw could be exploited through multiple attack paths including but not limited to parameter manipulation, session hijacking, or direct object reference attacks. The vulnerability's classification aligns with CWE-284, which addresses improper access control issues, and potentially CWE-285, which covers insufficient authorization problems. Attackers could leverage this weakness to perform unauthorized administrative actions, effectively compromising the entire system's integrity and confidentiality. The remote exploitation capability means that attackers do not require physical access or local network presence to exploit this vulnerability, making it particularly dangerous in publicly accessible environments.
The operational impact of CVE-2011-0720 is devastating for organizations relying on affected Plone systems, as it provides complete administrative control over content management platforms. This level of access enables attackers to modify or delete critical content, create backdoor accounts, alter system configurations, and potentially exfiltrate sensitive data. The ability to change site skins represents a particularly concerning aspect as it can be used to hide malicious functionality or create misleading interfaces that deceive users. Organizations using these vulnerable systems face significant risks including data breaches, service disruption, and potential regulatory compliance violations. The vulnerability's presence in multiple products including Conga and luci suggests that organizations may be exposed across their entire technology stack, not just individual applications. This widespread impact necessitates immediate remediation across all affected systems and platforms.
Mitigation strategies for CVE-2011-0720 must prioritize immediate patching of all affected Plone versions, with particular emphasis on upgrading from versions 2.5 through 4.0 to supported releases. Organizations should implement network segmentation to limit access to these systems and deploy robust monitoring solutions to detect unauthorized access attempts. The principle of defense in depth should be applied through multiple layers of security controls including web application firewalls, intrusion detection systems, and regular security assessments. Additionally, administrators should conduct thorough access reviews to ensure that only authorized personnel maintain administrative privileges and that all user accounts are properly managed. Given the severity of this vulnerability, organizations should also consider implementing temporary access restrictions while permanent fixes are deployed. The ATT&CK framework categorizes this vulnerability under privilege escalation techniques, specifically targeting the T1078 credential access tactic, highlighting the need for comprehensive security measures beyond simple patch management to protect against sophisticated attack vectors.