CVE-2022-39197: Fortra Cobalt Strike Teamserver Cross-Site Scripting (XSS) Vulnerability
- Is it exploited?
Yes. CISA added it to the Known Exploited Vulnerabilities catalog on 30 Mar 2023, 189 days after the CVE record was published.
- How likely is exploitation in the next 30 days?
- 46.7%
EPSS score, percentile 98.8 of all scored records
- How severe?
- 6.1 Medium
CVSS v3.1 base score, from CISA's enrichment of the record
- What should I do?
CISA deadline 20 Apr 2023. Apply updates per vendor instructions.
The CVE record links no vendor advisory, patch or mitigation.
- Which versions are affected?
Not stated. The CVE record gives vendor and product as “n/a” and the version as “unspecified”.
Source: CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.28, as of 28 Oct 2026; FIRST Exploit Prediction Scoring System (EPSS), v2026.06.15, as of 28 Oct 2026; CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.
What to do
Required action, set by CISA
Apply updates per vendor instructions.
CISA due date for this action: 20 April 2023.
Advisories and patches
The CVE record links no vendor advisory, patch or mitigation.
Linked from CISA's catalog entry
- https://www.cobaltstrike.com/blog/out-of-band-update-cobalt-strike-4-7-1/
- https://nvd.nist.gov/vuln/detail/CVE-2022-39197
Affected products and versions
The CVE record does not name affected products or versions: vendor and product are “n/a” and the version is “unspecified”.
Source: CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.
About this vulnerability
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.
Summary: CISA's KEV catalog, as of 28 Oct 2026.
- CISA added CVE-2022-39197 to its Known Exploited Vulnerabilities (KEV) catalog on 30 Mar 2023.
- CISA's ransomware flag for this entry is "Unknown": no evidence of ransomware use in the catalog, which is not proof of none.
- The due date CISA sets for the required action is 20 Apr 2023.
- The CVE record was published on 22 Sep 2022, 189 days before it was added to KEV.
- The CVE record carries a CVSS v3.1 base score of 6.1 (Medium), taken from CISA's enrichment of the record.
- FIRST's EPSS model puts the probability of exploitation in the next 30 days at 46.7% (percentile 98.8), as of 28 Oct 2026.
- CISA's SSVC assessment in the CVE record: exploitation active, automatable no, technical impact partial.
Source: CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.28, as of 28 Oct 2026; CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026; FIRST Exploit Prediction Scoring System (EPSS), v2026.06.15, as of 28 Oct 2026. About the data.
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).
Source: CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.
Weakness
CWE and CAPEC are maintained by MITRE; the entries are those named in the CVE record and the KEV entry.
Timeline
| Date | Event |
|---|---|
| 22 Sep 2022 | CVE record published |
| 30 Mar 2023 | Added to CISA KEV |
| 20 Apr 2023 | CISA due date for the required action |
| 21 Oct 2025 | CVE record last updated |
References
More exploited Fortra vulnerabilities
- CVE-2025-10035: Fortra GoAnywhere MFT Deserialization of Untrusted Data Vulnerability
- CVE-2022-42948: Fortra Cobalt Strike User Interface Remote Code Execution Vulnerability
- CVE-2023-0669: Fortra GoAnywhere MFT Remote Code Execution Vulnerability