A deserialization flaw within the License Servlet part of Fortra GoAnywhere Managed File Switch (MFT) platform.
Recognized as CVE-2025-10035, this vulnerability permits an unauthenticated attacker who can ship a solid license response signature to set off Java deserialization of attacker-supplied objects, doubtlessly leading to arbitrary command execution and full system compromise.
Deserialization Flaw (CVE-2025-10035)
GoAnywhere MFT’s License Servlet fails to deal with serialized information in license responses safely. The servlet deserializes information with out validating object varieties, resulting in a basic CWE-502: Deserialization of Untrusted Knowledge state of affairs.
When mixed with CWE-77: Command Injection, the problem permits distant code execution with Community Assault Vector (AV:N), Low Assault Complexity (AC:L), No Privileges Required (PR:N), No Consumer Interplay (UI:N), Excessive Scope Influence (S:C), and whole lack of Confidentiality (C:H), Integrity (I:H), and Availability (A:H), with a CVSS v3.1 rating of 10.0.
An attacker who can craft a malicious license response that passes signature verification can inject instructions through the deserialized object’s strategies.
A crafted serialized payload referencing java.lang.Runtime.exec() may seem as:
This code snippet illustrates how deserialized objects may be weaponized to execute arbitrary shell instructions on the server internet hosting the GoAnywhere Admin Console.
Threat FactorsDetailsAffected ProductsGoAnywhere MFTImpactRemote code execution (RCE)Exploit PrerequisitesForged license response signatureCVSS 3.1 Score10.0 (Essential)
Mitigations
Fortra said that profitable exploitation is contingent upon the GoAnywhere Admin Console being accessible over the Web. To mitigate quick threat, directors ought to:
Prohibit Admin Console entry by firewall guidelines or community ACLs so it’s not publicly reachable.
Confirm that solely trusted IP addresses could connect with the GoAnywhere administration interface.
Everlasting remediation requires upgrading GoAnywhere MFT to a patched launch. Affected clients should replace to model 7.8.4 or, if on the Maintain Launch department, model 7.6.3.
The updates embody validation routines within the License Servlet to implement class whitelisting and signature checks, eliminating unsafe deserialization. Safety groups are urged to prioritize this replace instantly, given the exploit’s ease and devastating potential affect.
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