What’s Vulnerable › Vulnerabilities

CVE-2022-39197: Fortra Cobalt Strike Teamserver Cross-Site Scripting (XSS) Vulnerability

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: yes — in CISA KEV since 2023-03-30
• EPSS: 44.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-09-22 · updated 2026-06-17
• Weakness: CWE-79

Description

An XSS (Cross Site Scripting) vulnerability was found in HelpSystems Cobalt Strike through 4.7 that allowed a remote attacker to execute HTML on the Cobalt Strike teamserver. To exploit the vulnerability, one must first inspect a Cobalt Strike payload, and then modify the username field in the payload (or create a new payload with the extracted information and then modify that username field to be malformed).

Affected products

• Helpsystems Cobalt Strike: before 4.7.1 — fixed in 4.7.1

How to fix

Upgrade to a fixed version: Helpsystems Cobalt Strike 4.7.1. Check the vendor advisory for mitigations.

References

• https://www.cobaltstrike.com/blog/out-of-band-update-cobalt-strike-4-7-1/
• https://www.cobaltstrike.com/blog/tag/release/
• https://www.cobaltstrike.com/blog/out-of-band-update-cobalt-strike-4-7-1/
• https://www.cobaltstrike.com/blog/tag/release/
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2022-39197

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