CVE-2020-8775 in PEGA Platform
Summary
by MITRE
Pega Platform before version 8.2.6 is affected by a Stored Cross-Site Scripting (XSS) vulnerability in the comment tags.
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Analysis
by VulDB Data Team • 10/14/2020
The vulnerability identified as CVE-2020-8775 represents a critical stored cross-site scripting flaw within the Pega Platform ecosystem, specifically impacting versions prior to 8.2.6. This vulnerability resides in the comment tags functionality, which serves as a fundamental component for user interaction and collaboration within the platform. The affected system allows malicious actors to inject persistent malicious scripts into comment fields that are then executed whenever other users view these comments, creating a dangerous attack vector that can compromise user sessions and data integrity. The vulnerability manifests when the platform fails to properly sanitize user input in comment tag fields, enabling attackers to craft malicious payloads that persist within the system's database.
The technical exploitation of this vulnerability follows the classic stored XSS pattern where malicious code is initially stored on the server and subsequently served to other users without proper input validation or output encoding. In the context of Pega Platform, when users create or modify comment tags containing malicious script content, the platform does not adequately filter or escape these inputs before storing them in the database. This allows attackers to inject javascript code, html tags, or other malicious content that executes in the context of other users' browsers when they view the affected comments. The vulnerability specifically targets the comment tag functionality, which is commonly used for user collaboration, issue tracking, and system communication within enterprise environments.
The operational impact of CVE-2020-8775 extends beyond simple data theft or session hijacking, as it can enable attackers to perform more sophisticated attacks such as credential theft, data exfiltration, and privilege escalation within the targeted environment. When users with elevated privileges view affected comments, the malicious scripts can execute with their permissions, potentially allowing attackers to access sensitive business data, modify system configurations, or even compromise the entire platform. This vulnerability poses particular risk in enterprise settings where Pega Platform is used for customer relationship management, case management, and business process automation, as it can undermine the integrity of critical business operations and user trust. The stored nature of the vulnerability means that once exploited, the malicious code continues to affect users until the affected comments are removed or the platform is patched, creating a persistent threat vector.
Organizations affected by this vulnerability should prioritize immediate remediation through the application of the vendor-provided patch for Pega Platform version 8.2.6 or later, as this represents the most effective mitigation strategy. Security teams should also implement additional protective measures such as input validation monitoring, regular security scanning of comment fields, and user education regarding the risks of viewing untrusted content. The vulnerability aligns with CWE-79 which specifically addresses cross-site scripting flaws, and follows ATT&CK technique T1566 for credential access through social engineering. Organizations should conduct thorough vulnerability assessments to identify any instances where this vulnerability may have been exploited, and consider implementing web application firewalls to provide additional protection against similar attacks. The incident underscores the critical importance of proper input sanitization and output encoding practices in enterprise web applications, particularly in platforms handling sensitive business data and user interactions.