CVE-2022-22115 in Teedy
Summary
by MITRE • 01/10/2022
In Teedy, versions v1.5 through v1.9 are vulnerable to Stored Cross-Site Scripting (XSS) in the name of a created Tag. Since the Tag name is not being sanitized properly in the edit tag page, a low privileged attacker can store malicious scripts in the name of the Tag. In the worst case, the victim who inadvertently triggers the attack is a highly privileged administrator. The injected scripts can extract the Session ID, which can lead to full Account Takeover of the administrator, and privileges escalation.
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Analysis
by VulDB Data Team • 01/13/2022
The vulnerability CVE-2022-22115 represents a critical stored cross-site scripting flaw in Teedy versions 1.5 through 1.9 that specifically targets the tag management functionality of the application. This vulnerability resides in the edit tag page where the application fails to properly sanitize user input when processing tag names, creating an avenue for persistent malicious script injection. The flaw allows attackers to store malicious JavaScript code within the tag name field, which then executes whenever the tag is displayed or processed by the application. Given that tag names are frequently referenced throughout the application interface and potentially in administrative contexts, this vulnerability presents a significant risk to system security and user privacy.
The technical exploitation of this vulnerability follows the typical stored XSS attack pattern where malicious input is first stored on the server and then served to other users without proper sanitization or encoding. In the context of Teedy's tag management system, when an attacker creates or modifies a tag with malicious script content in the name field, that script becomes persistent within the application's database. The vulnerability specifically affects the edit tag page functionality where user input validation is insufficient, allowing HTML and JavaScript code to bypass security controls. This represents a CWE-79 (Cross-site Scripting) vulnerability that manifests as a stored variant rather than a reflected one, making it particularly dangerous since the malicious payload persists and affects multiple users over time.
The operational impact of this vulnerability is severe, particularly when considering that administrators or highly privileged users may inadvertently trigger the stored payload. The risk escalates significantly when attackers target administrators, as the injected scripts can extract session identifiers and other sensitive authentication tokens from the victim's browser context. This session hijacking capability directly enables full account takeover scenarios where attackers can assume administrative privileges and gain complete control over the application environment. The privilege escalation potential stems from the fact that administrative users typically have elevated permissions and access to sensitive data, making this vulnerability a critical threat vector for unauthorized access and system compromise. The stored nature of the XSS payload means that even users who do not immediately interact with the malicious tag can be affected when the tag is displayed in various application contexts.
Mitigation strategies for CVE-2022-22115 should focus on implementing robust input sanitization and output encoding mechanisms within the tag management functionality. The most effective approach involves proper validation of all user input through strict sanitization processes that remove or encode potentially dangerous characters and script tags before storing data in the database. Application developers should implement Content Security Policy (CSP) headers to prevent execution of unauthorized scripts, while also ensuring that all output rendered to users is properly encoded according to the context in which it appears. Additionally, the application should enforce proper access controls and privilege separation to minimize the impact of successful exploitation attempts. Organizations should also consider implementing web application firewalls to detect and block malicious payloads, while conducting regular security assessments to identify similar vulnerabilities in other application components. The vulnerability aligns with ATT&CK technique T1531 (Modify System Image) and T1078 (Valid Accounts) as it enables both privilege escalation and unauthorized access through session hijacking, making comprehensive mitigation essential for protecting the overall security posture of the affected systems.