CVE-2024-3107 is a path traversal vulnerability classified under CWE-22 found in the Spectra – WordPress Gutenberg Blocks plugin, a widely used plugin that extends WordPress's Gutenberg editor capabilities. The flaw exists in the get_block_default_attributes function, which improperly limits pathname inputs, allowing an authenticated attacker with contributor-level permissions or higher to traverse directories and read the contents of any file named attributes.php on the server. This file can contain sensitive information such as configuration details or code attributes that could facilitate further exploitation or reconnaissance. The vulnerability requires authentication but no user interaction, making it easier to exploit for insiders or compromised accounts. The CVSS v3.1 base score is 4.3, reflecting a medium severity due to limited impact on confidentiality and no impact on integrity or availability. No patches or exploits are currently publicly available, but the vulnerability affects all versions up to and including 2.12.6. Given the plugin's popularity in WordPress environments, this vulnerability poses a notable risk to many websites globally.

The primary impact of CVE-2024-3107 is unauthorized disclosure of sensitive files named attributes.php, which may contain configuration data or code attributes critical to the security posture of the affected WordPress site. This information disclosure can aid attackers in crafting more targeted attacks, including privilege escalation or further exploitation of the site. Since the vulnerability requires contributor-level authentication, the risk is higher in environments where user accounts are less strictly controlled or where attackers have already compromised low-privilege accounts. The vulnerability does not directly affect system integrity or availability but can lead to indirect impacts through information leakage. Organizations running WordPress sites with the Spectra plugin are at risk, especially those with multiple contributors or less stringent access controls. The medium severity score reflects the moderate risk posed by this vulnerability.

To mitigate CVE-2024-3107, organizations should immediately update the Spectra – WordPress Gutenberg Blocks plugin to a version beyond 2.12.6 once a patch is released. Until a patch is available, restrict contributor-level permissions to trusted users only and audit existing contributor accounts for suspicious activity. Implement strict access controls and monitor logs for unusual file access attempts, particularly targeting attributes.php files. Employ web application firewalls (WAFs) with custom rules to detect and block path traversal attempts targeting this plugin's endpoints. Additionally, consider disabling or limiting the use of the vulnerable plugin if it is not essential. Regularly review and harden WordPress user roles and permissions to minimize the risk of exploitation by low-privilege users. Finally, maintain up-to-date backups and monitor security advisories from the plugin vendor and WordPress security communities.