CVE-2025-71420 in core-framework
Summary
by MITRE • 09/21/2026
UVdesk core-framework before 1.1.7 contains an authorization bypass vulnerability in the saved reply endpoint that allows authenticated agents to access replies restricted to other support groups. Attackers with ROLE_AGENT can enumerate saved reply identifiers and read content reserved for groups and teams they do not belong to.
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Analysis
by VulDB Data Team • 09/21/2026
The UVdesk core-framework, prior to version 1.1.7, contains a critical authorization bypass vulnerability within its saved reply endpoint functionality. This flaw stems from an insufficient access control mechanism that fails to properly verify whether the authenticated user requesting data has the requisite permissions for the specific resource being accessed. In typical ticketing systems like UVdesk, saved replies are often categorized and restricted based on organizational hierarchy, support groups, or teams to ensure sensitive information is only accessible to authorized personnel. However, in this vulnerable version, the backend logic does not adequately cross-reference the user's assigned roles against the group restrictions of the requested saved reply ID. Consequently, an attacker who has obtained valid authentication credentials with the ROLE_AGENT privilege can bypass these intended security boundaries and retrieve content that should remain confidential within specific support groups or teams.
From a technical perspective, this vulnerability represents a classic case of broken object level authorization, where the application trusts client-supplied identifiers without validating them against server-side access control lists. The attacker exploits this by enumerating saved reply identifiers through standard API calls or web interface interactions. Since the system does not enforce strict ownership checks during the retrieval process, any authenticated agent can iterate through potential IDs and successfully fetch the associated text content regardless of their actual group membership. This lack of granular permission checking allows for unauthorized data exfiltration, compromising the confidentiality integrity of internal knowledge bases that may contain proprietary procedures, customer-specific troubleshooting steps, or other sensitive operational details intended only for specific departments.
The operational impact of this vulnerability is significant for organizations relying on UVdesk for customer support operations. By accessing restricted saved replies, an insider threat or a compromised agent account can gain insights into the internal workings of different support teams. This information could be used to craft more convincing phishing attacks against customers by mimicking specific team communication styles or referencing internal protocols that are not publicly known. Furthermore, it undermines the principle of least privilege within the organization's IT infrastructure, potentially leading to broader security incidents if this access is leveraged in conjunction with other vulnerabilities. The ability to enumerate and read these replies also facilitates reconnaissance efforts, allowing attackers to map out the organizational structure and identify high-value targets or sensitive data stores based on the content found in restricted reply templates.
This vulnerability aligns closely with CWE-284, which describes Improper Access Control, specifically highlighting failures in authorization checks that allow users to access resources they are not permitted to view. In terms of offensive security frameworks, this behavior is consistent with ATT&CK technique T1078, Valid Accounts, where an adversary uses legitimate credentials to move laterally or gather information within a network environment. The enumeration aspect also relates to data discovery techniques often employed during the initial phases of an attack chain to identify valuable assets before attempting more direct exploitation methods.
To mitigate this risk, organizations running UVdesk must immediately upgrade their core-framework to version 1.1.7 or later, where these authorization checks have been corrected to ensure that users can only access saved replies associated with their assigned groups and teams. Until the update is applied, administrators should implement strict network-level controls such as web application firewalls configured to monitor for anomalous enumeration patterns of saved reply IDs. Additionally, implementing robust logging and monitoring solutions can help detect unusual access attempts by agents accessing resources outside their normal scope of work. Regular audits of user roles and permissions are also recommended to ensure that the principle of least privilege is strictly enforced across all support staff accounts, minimizing the potential blast radius if an agent account is compromised.