CVEvulnerability

CVE-2022-39197

6.1 MEDIUM Known exploited Published 2022-09-22 Modified 2026-06-17 Official page ↗

CISA Known Exploited Vulnerability

Fortra Cobalt Strike Teamserver Cross-Site Scripting (XSS) Vulnerability — Fortra Cobalt Strike

Fortra Cobalt Strike contains a cross-site scripting (XSS) vulnerability in Teamserver that would allow an attacker to set a malformed username in the Beacon configuration, allowing them to execute code remotely.

Added to KEV: 2023-03-30
Remediation due: 2023-04-20
Ransomware use: Unknown
Required action: Apply updates per vendor instructions.
Notes: https://www.cobaltstrike.com/blog/out-of-band-update-cobalt-strike-4-7-1/; https://nvd.nist.gov/vuln/detail/CVE-2022-39197

Status: Analyzed
Published: 2022-09-22
Last modified: 2026-06-17
Assigner: [email protected]
CVSS 3.1 ([email protected]): 6.1 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0): 6.1 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Weaknesses: 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 configurations

• helpsystems cobalt strike (< 4.7.1)

Weakness · CWE (1)

CWE-79 Improper Neutralization of Input During Web Page Generation weakness

References