CVE-2022-39197
Fortra Cobalt Strike Teamserver Cross-Site Scripting (XSS) Vulnerability
Does this matter?
Known to be exploited in the wild (CISA KEV, CISA remediation deadline 20 April 2023). Treat as an emergency change: patch or isolate now, then hunt for prior compromise.
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).
- CVSS 3.1
- 6.1 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- EPSS
- 44.15% probability · 99th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Listed 30 March 2023 · due 20 April 2023
- Weakness
- CWE-79
- Affected
- helpsystems/cobalt strike
- Source
- cve@mitre.org
EPSS moved from 47.9% on 29 October 2026 to 44.1% on 30 October 2026. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”.
CISA notes
Apply updates per vendor instructions. https://www.cobaltstrike.com/blog/out-of-band-update-cobalt-strike-4-7-1/; https://nvd.nist.gov/vuln/detail/CVE-2022-39197
References
- https://www.cobaltstrike.com/blog/out-of-band-update-cobalt-strike-4-7-1/Mitigation, Vendor Advisory
- https://www.cobaltstrike.com/blog/tag/release/Release Notes, Vendor Advisory
- https://www.cobaltstrike.com/blog/out-of-band-update-cobalt-strike-4-7-1/Mitigation, Vendor Advisory
- https://www.cobaltstrike.com/blog/tag/release/Release Notes, Vendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2022-39197US Government Resource
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.