WAF Release - 2025-05-05
Cloudflare WAF adds new rule coverage for five critical CVEs including RCE vulnerabilities in GFI KerioControl, SonicWall SMA, XWiki, Langflow, and MinIO. New detections have been added to the Managed Ruleset with block actions enabled to protect against these threats.
This week's analysis covers five CVEs with varying impact levels. Four are rated critical, while one is rated high severity. Remote Code Execution vulnerabilities dominate this set.
Key Findings
GFI KerioControl (CVE-2024-52875) contains an unauthenticated Remote Code Execution (RCE) vulnerability that targets firewall appliances. This vulnerability can let attackers gain root level system access, making this CVE particularly attractive for threat actors.
The SonicWall SMA vulnerabilities remain concerning due to their continued exploitation since 2021. These critical vulnerabilities in remote access solutions create dangerous entry points to networks.
Impact
Customers using the Managed Ruleset will receive rule coverage following this week's release. Below is a breakdown of the recommended prioritization based on current exploitation trends:
- GFI KerioControl (CVE-2024-52875) - Highest priority; unauthenticated RCE
- SonicWall SMA (Multiple vulnerabilities) - Critical for network appliances
- XWiki (CVE-2025-24893) - High priority for development environments
- Langflow (CVE-2025-3248) - Important for AI workflow platforms
- MinIO (CVE-2025-31489) - Important for object storage implementations
| Ruleset | Rule ID | Legacy Rule ID | Description | Previous Action | New Action | Comments |
|---|---|---|---|---|---|---|
| Cloudflare Managed Ruleset | ...d0b7a392 | 100724 | GFI KerioControl - Remote Code Execution - CVE:CVE-2024-52875 | Log | Block | This is a New Detection |
| Cloudflare Managed Ruleset | ...717a9e42 | 100748 | XWiki - Remote Code Execution - CVE:CVE-2025-24893 | Log | Block | This is a New Detection |
| Cloudflare Managed Ruleset | ...e9cf745d | 100750 | SonicWall SMA - Dangerous File Upload - CVE:CVE-2021-20040, CVE:CVE-2021-20041, CVE:CVE-2021-20042 | Log | Block | This is a New Detection |
| Cloudflare Managed Ruleset | ...d29da333 | 100751 | Langflow - Remote Code Execution - CVE:CVE-2025-3248 | Log | Block | This is a New Detection |
| Cloudflare Managed Ruleset | ...caa7b208 | 100752 | MinIO - Auth Bypass - CVE:CVE-2025-31489 | Log | Block | This is a New Detection |
Source: original entry ↗
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