CVE-2026-59074 in Edito
Summary
by MITRE • 11/13/2026
Edito CMS is vulnerable to improper cryptographic signature verification in the JWT refresh logic. An authenticated low-privilege user can submit self-crafted JWT containing an existing user identifier and, due to the lack of signature validation, obtain a valid, fully-signed session token for any account in the system. This allows the attacker to impersonate any user, including administrators. This issue was fixed in version 5.10.2607. Hotfixes for older versions (5.8) have also been released.
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Analysis
by VulDB Data Team • 11/13/2026
The vulnerability identified within Edito CMS represents a critical failure in the implementation of JSON Web Token authentication mechanisms, specifically concerning the token refresh logic. In modern web applications, JWTs are commonly used to maintain user sessions after initial login. The system relies on cryptographic signatures to ensure that tokens have not been tampered with and originate from a trusted source. However, due to improper verification procedures during the refresh process, the application fails to validate the digital signature of incoming JWT requests intended for token renewal. This flaw effectively bypasses one of the primary security controls designed to prevent unauthorized access and identity manipulation within the system architecture.
From an operational perspective, this technical deficiency allows any authenticated user with low privileges to perform a privilege escalation attack without requiring additional credentials or exploiting separate vulnerabilities in other components. By submitting a self-crafted JWT that contains the identifier of another existing user, including those with administrative roles, the attacker can trick the server into issuing a new, fully signed session token for that target account. Because the signature validation is omitted during this specific refresh operation, the system accepts the manipulated payload as legitimate. This results in the complete compromise of authentication integrity, enabling the attacker to impersonate any user within the ecosystem and gain unauthorized access to sensitive data or administrative functions reserved for higher-privilege accounts.
The impact of this vulnerability extends beyond simple account takeover; it undermines the fundamental trust model of the application's security infrastructure. An adversary leveraging this flaw can bypass role-based access controls, potentially leading to data exfiltration, modification of critical system configurations, or further lateral movement within the network if Edito CMS is integrated with other services that rely on its authentication state. The ability to assume administrative identities poses a severe risk to confidentiality, integrity, and availability, as attackers could alter application logic, delete logs to cover their tracks, or deploy malicious code under the guise of an authorized administrator.
This issue aligns closely with CWE-347, which describes Improper Verification of Cryptographic Signature, indicating that the software does not properly verify a digital signature against a corresponding cryptographic key or certificate. In terms of offensive security frameworks, this vulnerability facilitates techniques associated with ATT&CK T1078, specifically Valid Accounts and Default Accounts, as it allows an attacker to use legitimate credentials in an unauthorized manner by manipulating the token structure rather than stealing passwords directly. It also relates to MITRE ATT&CK technique T1621, Multi-Factor Bypass, if multi-factor authentication relies on session tokens that are compromised through this method.
To mitigate this risk and prevent similar issues in future development cycles, it is imperative to enforce strict cryptographic verification at every stage of token lifecycle management, including refresh operations. Developers must ensure that the signature validation logic used during initial issuance is identically applied when processing refresh requests. Implementing robust input validation and ensuring that all JWT payloads are verified against the correct public key or secret before any state changes occur will close this gap. Organizations currently running affected versions of Edito CMS should immediately upgrade to version 5.10.2607, which contains the official fix for this vulnerability. For users on older iterations such as version 5.8, applying the provided hotfixes is essential to restore security posture and prevent exploitation by malicious actors seeking to escalate privileges within the environment.