CVE-2025-52670 Overview
CVE-2025-52670 is a missing authorization vulnerability in Revive Adserver versions 5.5.2, 6.0.1, and earlier. Authenticated users can delete banners owned by other accounts because the application fails to verify ownership before processing delete requests. The flaw maps to both CWE-639 (Authorization Bypass Through User-Controlled Key) and CWE-862 (Missing Authorization). Exploitation requires only low-privilege network access and no user interaction, making cross-tenant banner deletion trivial for any account holder on the platform.
Critical Impact
Any authenticated user can delete banners belonging to other advertisers, causing integrity loss across shared ad server tenants.
Affected Products
- Revive Adserver 5.5.2
- Revive Adserver 6.0.1
- Revive Adserver earlier versions
Discovery Timeline
- 2025-11-20 - CVE-2025-52670 published to NVD
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2025-52670
Vulnerability Analysis
Revive Adserver is an open-source ad management platform used by publishers and advertisers to serve display banners. The application supports multi-tenant deployments where distinct accounts manage their own campaigns and banners. CVE-2025-52670 breaks that tenant isolation on the banner deletion path.
The vulnerability is an Insecure Direct Object Reference (IDOR). When a user submits a request to delete a banner, the application accepts a banner identifier from the request and processes the deletion without confirming that the banner belongs to the requesting account. As a result, an attacker with any valid account can enumerate banner IDs and issue delete requests targeting resources owned by other users.
The impact is scoped to integrity: banners can be destroyed, disrupting active advertising campaigns and revenue delivery. Confidentiality and availability of the wider system are not directly affected by this specific flaw.
Root Cause
The root cause is a missing authorization check in the banner deletion handler. The code path treats the caller as authorized to act on the identified banner solely because the caller is authenticated. Ownership binding between the banner record and the invoking account is not enforced before the delete operation executes.
Attack Vector
An attacker authenticates to the target Revive Adserver instance using any valid low-privilege account. The attacker then sends a crafted request to the banner deletion endpoint, supplying the numeric identifier of a banner owned by another account. Banner IDs are sequential, so enumeration is straightforward. The server processes the request and removes the target banner.
See the HackerOne Security Report #3401612 for the disclosure details.
Detection Methods for CVE-2025-52670
Indicators of Compromise
- Unexpected banner deletion events in Revive Adserver audit logs where the acting user does not match the banner owner.
- HTTP requests to banner delete endpoints from user sessions that do not otherwise interact with the targeted advertiser account.
- Bursts of sequential banner ID references in access logs from a single authenticated session.
Detection Strategies
- Correlate application audit logs with account ownership metadata to flag delete actions crossing tenant boundaries.
- Alert on high-volume banner deletion activity originating from newly created or low-reputation accounts.
- Review web server access logs for repeated POST or GET requests to banner administration URLs with iterating identifiers.
Monitoring Recommendations
- Enable verbose application logging for administrative actions, including the account performing the action and the resource owner.
- Ship Revive Adserver logs to a centralized log platform for retention and cross-account correlation.
- Baseline normal deletion rates per account and alert on statistical deviations.
How to Mitigate CVE-2025-52670
Immediate Actions Required
- Upgrade Revive Adserver to a fixed release beyond 5.5.2 and 6.0.1 as published by the vendor.
- Audit banner inventories against backups to identify any unauthorized deletions that occurred before patching.
- Rotate credentials for accounts that show anomalous administrative activity in logs.
Patch Information
The Revive Adserver maintainers addressed the missing authorization check in versions released after 5.5.2 and 6.0.1. Administrators should consult the HackerOne Security Report #3401612 and the official Revive Adserver release notes for the specific fixed version and apply the update through the standard upgrade procedure.
Workarounds
- Restrict account creation on production ad servers to trusted operators until the patch is applied.
- Place the Revive Adserver administrative interface behind a reverse proxy or VPN to limit exposure of authenticated endpoints.
- Take frequent database backups of banner tables so deleted records can be restored quickly.
# Configuration example: verify installed Revive Adserver version before and after upgrade
grep -R "VERSION" /path/to/revive-adserver/lib/max/constants.php
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
