Overview
A critical security vulnerability, identified as CVE-2025-52670, has been discovered in Revive Adserver. This flaw affects versions 5.5.2 and 6.0.1 and earlier. The vulnerability stems from a missing authorization check, which allows authenticated users within the system to delete banners owned by other accounts. This poses a significant risk to the integrity of advertising campaigns and data security.
Technical Details
The vulnerability lies in the absence of proper authorization checks before allowing a user to delete a banner. Normally, the system should verify that the user attempting to delete a banner has the necessary permissions (e.g., being the owner of the banner or having administrative privileges). Due to this missing check, an attacker with a regular user account can craft a request to delete banners associated with other user accounts, effectively disrupting or sabotaging their campaigns. The specific endpoint or function responsible for banner deletion lacks the appropriate validation to ensure the requesting user has the authorization to perform the operation.
CVSS Analysis
The National Vulnerability Database (NVD) has assigned this vulnerability a CVSS score of N/A. While the exact score isn’t available, the impact described suggests a high level of concern due to the potential for data loss and disruption of services. A low CVSS score here is likely inaccurate and requires careful consideration given the impact potential.
Possible Impact
The exploitation of this vulnerability can lead to several negative consequences:
- Data Loss: Irreversible deletion of banners, leading to a loss of advertising assets.
- Campaign Disruption: Advertising campaigns can be severely disrupted or halted entirely, resulting in financial losses for advertisers.
- Reputational Damage: If exploited on a large scale, the incident could damage the reputation of the affected Revive Adserver instance.
- Competitive Advantage: Malicious actors could target competitor’s accounts and sabotage their advertising efforts.
Mitigation and Patch Steps
To mitigate the risk posed by CVE-2025-52670, the following steps are recommended:
- Upgrade Revive Adserver: The primary mitigation is to upgrade to a patched version of Revive Adserver that addresses this vulnerability. Check the official Revive Adserver website for the latest releases and security advisories.
- Temporary Workaround (If Patch Not Available): As a temporary measure, review and harden the server-side code responsible for banner deletion. Implement authorization checks to verify that the user has the necessary permissions before allowing the deletion to proceed. This requires advanced programming knowledge.
- Monitor System Logs: Closely monitor system logs for any suspicious activity related to banner deletion. Look for unusual patterns of requests or deletions from unauthorized users.
- Restrict User Permissions: Review user roles and permissions. Ensure that users only have the necessary permissions to perform their tasks. Avoid granting excessive privileges that could be exploited.
References
HackerOne Report: Missing Authorization Check (hackerone.com)
