CVE-2025-68398 is a critical security vulnerability identified in Weblate, a popular web-based localization tool used to manage translations and localization workflows. The vulnerability arises from improper input validation (CWE-20), directory traversal (CWE-22), and unrestricted upload of files (CWE-434), which collectively allow an authenticated attacker to remotely overwrite Git configuration files. This flaw enables attackers to manipulate Git behavior, potentially redirecting repository URLs, injecting malicious commands, or altering repository states. Since Weblate integrates tightly with Git repositories to manage translation files, compromising Git configuration can lead to severe consequences including unauthorized code execution, data leakage, or disruption of localization pipelines. The vulnerability affects all Weblate versions prior to 5.15.1 and requires the attacker to have high privileges (authenticated user with sufficient rights) but does not require any user interaction. The CVSS v3.1 base score is 9.1, reflecting the critical impact on confidentiality, integrity, and availability, as well as the network attack vector and low attack complexity. Although no known exploits are currently reported in the wild, the severity and nature of the flaw make it a high-risk issue. The vulnerability was publicly disclosed on December 18, 2025, and fixed in version 5.15.1 of Weblate. Organizations using Weblate should prioritize patching and review their Git configurations for unauthorized changes to mitigate potential exploitation.

For European organizations, the impact of CVE-2025-68398 can be substantial, particularly for those relying on Weblate for managing localization and translation workflows in software development, documentation, or product internationalization. Exploitation could lead to unauthorized modification of Git repositories, resulting in code tampering, insertion of malicious code, or disruption of development pipelines. This can compromise the integrity of software products, cause data breaches, and lead to service outages. Organizations with multi-tenant or public-facing Weblate instances face increased risk of lateral movement and privilege escalation. The breach of Git configurations can also undermine trust in software supply chains, a critical concern in Europe given regulatory focus on software security and data protection (e.g., GDPR). Additionally, the availability of localization services could be disrupted, affecting business continuity and customer experience. The critical severity and network accessibility of the vulnerability mean that attackers could exploit it remotely, increasing the threat surface for European enterprises.

1. Immediately upgrade all Weblate installations to version 5.15.1 or later, where the vulnerability is patched. 2. Conduct a thorough audit of Git configuration files and repository settings to detect and remediate any unauthorized changes made prior to patching. 3. Restrict Weblate user privileges to the minimum necessary, ensuring that only trusted users have high-level access capable of modifying Git configurations. 4. Implement network segmentation and access controls to limit exposure of Weblate instances to trusted networks and users only. 5. Monitor Weblate logs and Git repository activities for unusual or unauthorized actions that could indicate exploitation attempts. 6. Employ Web Application Firewalls (WAFs) with custom rules to detect and block suspicious input patterns targeting Git configuration files. 7. Educate development and localization teams about the risks associated with this vulnerability and enforce secure coding and deployment practices. 8. Regularly back up Git repositories and Weblate configurations to enable rapid recovery in case of compromise. 9. Consider deploying intrusion detection systems (IDS) to alert on anomalous behaviors related to Git operations within Weblate environments.