Fortra GoAnywhere MFT Deserialization of Untrusted Data Vulnerability
A deserialization vulnerability in the License Servlet of Fortra's GoAnywhere MFT allows an actor with a validly forged license response signature to deserialize an arbitrary actor-controlled object, possibly leading to command injection.
Severity = CVSS. Probability = EPSS (FIRST). Exploitation = public signals: KEV, EUVD, ransomware, EPSS above 10 %, no account required.
Exploitation probability EPSS · FIRST
Exploitation signals 5 / 5
- KEV catalog (CISA)29 Sept 2025
- Exploited in EUVD (ENISA)29 Sept 2025
- Used by ransomwareyes
- EPSS above 10 %99.8%
- No account, over the networkyes
What to do
Fix
Apply the vendor’s fix as soon as it is available.
CISA guidance: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Meanwhile
Take the service off the internet or restrict access to it, watch the logs and look for signs of compromise.
Manufacturers (CRA)
Exploited vulnerability in your product: early warning to ENISA within 24 h, then notification within 72 h (Article 14 of the Cyber Resilience Act). The CRA explained
Affected products
- 0 ≤7.8.3
Open source packages OSV
Affected libraries according to OSV, with fixed versions.
Timeline
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Published
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Exploitation reported (ENISA)
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Added to the KEV catalog
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CISA remediation due date
-
EPSS peak: 99.8%
References
Other exploited vulnerabilities from the same vendor
- CVE-2022-42948Fortra Cobalt Strike User Interface Remote Code Execution Vulnerability5.8 · Background exploitation
- CVE-2022-39197Fortra Cobalt Strike Teamserver Cross-Site Scripting (XSS) Vulnerability6.2 · Background exploitation
- CVE-2023-0669Fortra GoAnywhere MFT Remote Code Execution Vulnerability8.3 · Background exploitation