Fortra Cobalt Strike User Interface Remote Code Execution Vulnerability
Cobalt Strike 4.7.1 fails to properly escape HTML tags when they are displayed on Swing components. By injecting crafted HTML code, it is possible to remotely execute code in the Cobalt Strike UI.
Severity = CVSS. Probability = EPSS (FIRST). Exploitation = public signals: KEV, EUVD, ransomware, EPSS above 10 %, no account required.
Exploitation probability EPSS · FIRST
Exploitation signals 3 / 5
- KEV catalog (CISA)30 Mar 2023
- Exploited in EUVD (ENISA)30 Mar 2023
- Used by ransomwareno
- EPSS above 10 %2.7%
- No account, over the networkyes
What to do
Fix
Apply the vendor’s fix as soon as it is available.
CISA guidance: Apply updates per vendor instructions.
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
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
References
Other exploited vulnerabilities from the same vendor
- CVE-2025-10035Fortra GoAnywhere MFT Deserialization of Untrusted Data Vulnerability10.0 · 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