CVE-2025-65430 is a vulnerability identified in the allauth-django library, a popular Django authentication package used for managing user authentication and identity provider (IdP) functionality. The flaw exists in versions prior to 65.13.0, where the system fails to invalidate access and refresh tokens after a user account is marked as inactive (is_active=False). Normally, when an account is disabled, any issued tokens should be rejected to prevent further access. However, due to this issue, tokens handed out before deactivation remain valid, allowing an attacker or unauthorized user to continue accessing protected resources despite the account being disabled. This vulnerability is classified under CWE-613 (Insufficient Session Expiration). The CVSS 3.1 base score is 5.4, reflecting medium severity, with an attack vector of network (AV:N), low attack complexity (AC:L), requiring privileges (PR:L), no user interaction (UI:N), unchanged scope (S:U), and impacts on confidentiality and integrity but not availability (C:L/I:L/A:N). No known exploits are currently reported in the wild. The fix implemented in version 65.13.0 ensures that tokens are rejected once the user is marked inactive, restoring proper session invalidation behavior. Organizations using allauth-django for authentication should verify their version and apply updates promptly to mitigate this risk.

For European organizations, this vulnerability poses a risk of unauthorized access persistence even after user accounts are disabled, potentially leading to data leakage or unauthorized actions under the guise of a deactivated user. This can undermine trust in identity management systems and complicate compliance with regulations such as GDPR, which require strict access controls and timely revocation of user privileges. The impact is particularly significant for organizations handling sensitive personal data or critical infrastructure where user deactivation is a common security control. Since the vulnerability affects token invalidation, attackers could exploit it to maintain access without needing to reauthenticate, increasing the risk of insider threats or compromised accounts being leveraged for lateral movement. Although no availability impact is noted, the confidentiality and integrity risks warrant prompt remediation. The medium severity rating suggests this is a moderate but actionable threat that should be prioritized alongside other security updates.

European organizations should immediately verify if they are using allauth-django versions prior to 65.13.0 and plan an upgrade to the latest patched release. In environments where immediate patching is not feasible, temporary mitigations include implementing additional token revocation mechanisms at the application or API gateway level, such as maintaining a blacklist of tokens associated with deactivated users. Monitoring and alerting on unusual token usage patterns, especially from accounts recently marked inactive, can help detect exploitation attempts. Organizations should also review their user deactivation workflows to ensure tokens are invalidated promptly and consider shortening token lifetimes to reduce exposure windows. Integrating multi-factor authentication (MFA) can further reduce risk by adding an additional verification layer. Finally, conducting regular security audits and penetration tests focusing on authentication flows will help identify similar weaknesses.