What is CVE-2019-15944?

CVE-2019-15944 is a medium-severity vulnerability in Valvesoftware Counter-Strike\, classified under Improper Encoding or Escaping of Output. CVSS score: 5.3/10. Published 2019-09-05.

How severe is CVE-2019-15944?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Vulnerability in Valvesoftware Counter-Strike\

CVE-2019-15944

In Counter-Strike: Global Offensive before 8/29/2019, community game servers can display unsafe HTML in a disconnection message.

Published 2019-09-05 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.

EPSS exploit prediction

EPSS: 0.010 (59.9th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 60th percentile — 59.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000

Affected products

Valvesoftware Counter-Strike\ — versions global_offensive
Valvesoftware Counter-Strike\:global Offensive

Weakness classification (CWE)

CWE-116 — Improper Encoding or Escaping of Output

References

blog.counter-strike.net/index.php/2019/08/25353/ (Vendor Advisory)

Frequently asked questions

What is CVE-2019-15944?: CVE-2019-15944 is a medium-severity vulnerability in Valvesoftware Counter-Strike\, classified under Improper Encoding or Escaping of Output. CVSS score: 5.3/10. Published 2019-09-05.
How severe is CVE-2019-15944?: Medium severity. CVSS v3 base score is 5.3 out of 10.