CVE-2023-26428 in OX App Suite
Summary
by MITRE • 06/20/2023
Attackers can successfully request arbitrary snippet IDs, including E-Mail signatures of other users within the same context. Signatures of other users could be read even though they are not explicitly shared. We improved permission handling when requesting snippets that are not explicitly shared with other users. No publicly available exploits are known.
If you want to get the best quality for vulnerability data then you always have to consider VulDB.
Analysis
by VulDB Data Team • 07/16/2023
This vulnerability represents a critical access control flaw that allows attackers to bypass authorization mechanisms when retrieving user-specific content within a shared environment. The issue manifests when users can request arbitrary snippet identifiers including email signatures belonging to other users within the same system context. This represents a direct violation of data confidentiality principles and demonstrates insufficient input validation and access control enforcement. The vulnerability exists in the snippet retrieval system where proper authorization checks fail to validate whether the requesting user has legitimate access rights to the target snippet content. This flaw specifically impacts systems where users share common contexts or environments while maintaining separate personal data elements. The vulnerability aligns with CWE-285 which addresses improper authorization in software systems, and may also map to CWE-20 which covers input validation issues that lead to privilege escalation. From an operational perspective this vulnerability creates significant risk as attackers can potentially access sensitive personal information including email signatures that may contain confidential communication patterns, contact details, or organizational information. The lack of publicly available exploits does not diminish the severity as this type of information disclosure vulnerability often serves as a stepping stone for more sophisticated attacks. The vulnerability is particularly concerning in environments where users share common workspaces, collaboration platforms, or enterprise systems where such cross-user data access could lead to information leakage, privacy violations, or potential credential harvesting through signature analysis. The attack vector requires minimal technical expertise as it relies on predictable snippet ID patterns or enumeration techniques that could be automated. This type of vulnerability commonly appears in web applications where RESTful APIs or similar interfaces fail to properly validate user permissions against requested resources. The improved permission handling implemented as a fix addresses the core issue by ensuring that snippet retrieval requests undergo proper authorization checks before content is returned, regardless of whether the snippet is explicitly shared with the requesting user. This remediation approach aligns with the principle of least privilege and proper access control implementation. Organizations should consider implementing comprehensive logging of snippet access requests to detect anomalous behavior patterns that may indicate exploitation attempts. The vulnerability demonstrates the importance of robust access control design in multi-user environments where shared contexts do not automatically grant access to all user data elements. Security teams should conduct thorough penetration testing of similar interfaces to identify potential authorization bypasses and ensure that all data access points properly validate user permissions against requested resources. The fix should also include rate limiting and monitoring mechanisms to prevent automated enumeration attacks that could exploit this vulnerability at scale.