WAF - Emergency update for Fortra GoAnywhere MFT deserialization vulnerability
Cloudflare WAF has added emergency detection rules for CVE-2025-10035, a critical deserialization vulnerability in Fortra's GoAnywhere MFT that allows remote code execution and privilege escalation via forged license response signatures. The new rule blocks exploitation attempts by detecting suspicious license servlet activity.
This week highlights a critical vendor-specific vulnerability: a deserialization flaw in the License Servlet of Fortra’s GoAnywhere MFT. By forging a license response signature, an attacker can trigger deserialization of arbitrary objects, potentially leading to command injection.
Key Findings
- GoAnywhere MFT (CVE-2025-10035): Deserialization vulnerability in the License Servlet that allows attackers with a forged license response signature to deserialize arbitrary objects, potentially resulting in command injection.
Impact
GoAnywhere MFT (CVE-2025-10035): Exploitation enables attackers to escalate privileges or achieve remote code execution via command injection.
| Ruleset | Rule ID | Legacy Rule ID | Description | Previous Action | New Action | Comments |
|---|---|---|---|---|---|---|
| Cloudflare Managed Ruleset | ...e08b39f3 | 100787 | Fortra GoAnywhere - Auth Bypass - CVE:CVE-2025-10035 | N/A | Block | This is a New Detection |
Source: original entry ↗
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