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CVE-2022-39197

Fortra Cobalt Strike Teamserver Cross-Site Scripting (XSS)

6.1 MEDIUMActively exploited (CISA KEV)EPSS 46.4%
  1. Published21 Sept 2022
  2. Added to CISA KEV30 Mar 2023
  3. Remediation due20 Apr 2023
Actively exploited (CISA KEV)

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: 30 Mar 2023Federal remediation due: 20 Apr 2023

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 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionRequired
ScopeChanged
ConfidentialityLow
IntegrityLow
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Affected products

Helpsystems Cobalt Strike< 4.7.1

Remediation

Fixed in
Helpsystems Cobalt Strike≥ 4.7.1

References

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Frequently asked

Is CVE-2022-39197 being actively exploited?

Yes. CVE-2022-39197 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added 30 Mar 2023.

How severe is CVE-2022-39197?

CVE-2022-39197 has a CVSS 3.1 base score of 6.1, rated medium. EPSS estimates a 46.4% probability of exploitation.

Which products are affected by CVE-2022-39197?

Affected products include Helpsystems Cobalt Strike.

How do I fix CVE-2022-39197?

Upgrade affected software to a fixed version, for example Helpsystems Cobalt Strike 4.7.1 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2022-39197 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. Because it is on the CISA KEV list, Secuno flags any affected asset as top-priority automatically. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.