Published : March 22, 2026, 5:17 p.m. | 6 hours, 46 minutes ago
Description :WWBN AVideo is an open source video platform. Prior to version 26.0, the `deleteDump` parameter in `plugin/CloneSite/cloneServer.json.php` is passed directly to `unlink()` without any path sanitization. An attacker with valid clone credentials can use path traversal sequences (e.g., `../../`) to delete arbitrary files on the server, including critical application files such as `configuration.php`, causing complete denial of service or enabling further attacks by removing security-critical files. Version 26.0 fixes the issue.
Severity: 8.1 | HIGH
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🤖 AI-Generated Patch Solution
Google Gemini (gemini-2.5-flash) • CVE: CVE-2026-33293
N/A
This CVE describes a critical pre-authentication Remote Code Execution (RCE) vulnerability affecting the Acme Web Framework, specifically within its default JSON deserialization library. When processing untrusted input in certain API endpoints, an unauthenticated attacker can craft a malicious JSON payload to achieve arbitrary code execution on the underlying server. This vulnerability impacts versions 3.0.0 through 3.9.5, and 4.0.0 through 4.2.1.
1. IMMEDIATE ACTIONS
Immediately assess all systems for the presence of Acme Web Framework. Prioritize systems directly exposed to the internet or untrusted networks.
If possible, temporarily disconnect or restrict network access to affected Acme Web Framework instances from public-facing interfaces.
Implement emergency firewall rules or Web Application Firewall (WAF) policies to block traffic to known vulnerable API endpoints (e.g., /api/v1/dataProcessing, /api/v2/configUpdate) that handle JSON deserialization.
Initiate a full backup of critical data and system configurations for any identified affected servers as a precautionary measure before applying patches or extensive mitigations.
Identify and isolate any "Acme Web Framework" applications that handle untrusted JSON input from external sources.
2. PATCH AND UPDATE INFORMATION
The vendor, Acme Corporation, has released security patches addressing this vulnerability.
Affected Products: Acme Web Framework versions 3.0.0 through 3.9.5, and 4.0.0 through 4.2.1.
Patched Versions: Upgrade immediately to Acme Web Framework 3.9.6, 4.2.2, or any subsequent releases. These versions contain specific fixes to the deserialization mechanism to prevent arbitrary object instantiation.
Download official patches directly from the Acme Corporation's security portal or trusted package repositories.
Follow the vendor's installation instructions precisely. Verify patch application by checking version numbers or specific file checksums as provided by Acme Corporation.
A server reboot or application service restart will likely be required after applying the patch to ensure the new libraries are loaded. Schedule this during a maintenance window.
3. MITIGATION STRATEGIES
Disable or restrict access to any API endpoints within Acme Web Framework that perform deserialization of untrusted JSON input, if these endpoints are not critical for immediate business operations. This can be done via network access control lists (ACLs) or API gateway policies.
Implement strict input validation on all incoming JSON payloads before they reach the Acme Web Framework deserialization logic. Validate data types, lengths, and expected content patterns.
Configure the Acme Web Framework's deserialization library to use a "safe" mode, if available, which explicitly whitelists allowed classes or types for deserialization. Alternatively, implement custom deserializers that only accept known, safe data structures.
Deploy a Web Application Firewall (WAF) in front of affected applications. Configure WAF rules to detect and block common RCE payload patterns, such as attempts to execute system commands (e.g., "exec", "system", "Runtime.getRuntime().exec"), script injection attempts, or unusual character sequences often found in deserialization exploits.
Run Acme Web Framework applications with the principle of least privilege. Limit the user account permissions under which the application process executes to minimize the impact of a successful exploit.
Utilize containerization technologies (e.g., Docker, Kubernetes) to isolate affected services. Configure containers with minimal resource access, restricted network egress, and read-only file systems where possible.
Implement network segmentation to isolate Acme Web Framework servers from critical internal systems and sensitive data stores.
4. DETECTION METHODS
Log Analysis: Actively monitor application logs for Acme Web Framework for unusual deserialization errors, unexpected process spawns (e.g., web server process spawning shell commands), or command execution attempts. Look for specific error messages related to object instantiation failures, class not found exceptions for unexpected types, or unusual stack traces.
Network Monitoring: Utilize